Best Probiotics for Fertility: What the Science Says About Conception and Your Microbiome
Understanding how gut and vaginal microbiome health influence reproductive outcomes — and which probiotic strains the research supports
When most women think about preparing their bodies for conception, prenatal vitamins, folic acid, and hormone panels come to mind first. What rarely makes the list — but arguably should — is the health of the microbiome. A growing body of peer-reviewed research now links both the gut microbiome and the vaginal microbiome to fertility outcomes, from hormone metabolism and ovulation to embryo implantation and pregnancy maintenance.
This doesn't mean probiotics are a magic bullet for getting pregnant. The research is still evolving, and no supplement replaces medical fertility care. But the evidence is increasingly clear: the microbial environment of your reproductive tract — and the gut bacteria that influence your hormonal balance — play meaningful roles in creating favorable conditions for conception.[1][2]
This article breaks down what the peer-reviewed literature actually shows about probiotics and fertility, which specific Lactobacillus and Bifidobacterium strains have the strongest research backing, and how to evaluate a probiotic supplement if you're trying to conceive.
Key Takeaways
- A Lactobacillus-dominated vaginal microbiome is associated with better fertility outcomes. In IVF patients, a Lactobacillus-dominant endometrium was linked to significantly higher implantation rates (60.7% vs. 23.1%) and live birth rates (58.8% vs. 6.7%).[3]
- Four Lactobacillus species — L. crispatus, L. gasseri, L. iners, and L. jensenii — define the major healthy vaginal community types. L. gasseri specifically dominates Community State Type II, one of the protective vaginal microbiome profiles.[4]
- The gut microbiome regulates estrogen through the "estrobolome," a collection of bacteria that influence how estrogen is metabolized, reabsorbed, and circulated — directly affecting hormonal balance and ovulatory function.[5]
- Probiotic strains including L. rhamnosus, L. reuteri, L. acidophilus, and L. plantarum have been studied for vaginal health restoration, immune modulation, and anti-inflammatory effects relevant to reproductive health.[6][7]
- Synbiotic formulations — probiotics combined with prebiotics — show the most consistent benefits in research on hormonal and inflammatory markers in conditions like PCOS that affect fertility.[8]
How Your Microbiome Affects Fertility
The word "microbiome" often conjures images of digestive health, but its influence extends well beyond the gut. Women have distinct microbial ecosystems in the vagina, the uterus (endometrium), and the gastrointestinal tract — and research increasingly shows that all three contribute to reproductive function.
The Gut–Hormone Connection
Your gut microbiome plays a direct role in estrogen regulation. A specialized subset of gut bacteria known as the estrobolome produces enzymes — primarily beta-glucuronidase — that determine how much estrogen gets reabsorbed into your bloodstream versus excreted. When gut dysbiosis disrupts this process, circulating estrogen levels can swing too high or too low, contributing to irregular cycles, anovulation, and conditions like PCOS and endometriosis that impair fertility.[5]
PCOS is one of the leading causes of anovulatory infertility, and the same gut dysbiosis driving hormonal imbalance in PCOS also affects reproductive outcomes. For a deep dive into the clinical evidence connecting specific probiotic strains to insulin resistance, androgen reduction, and menstrual regularity in PCOS, see our full guide to probiotics for PCOS.
The gut microbiome also governs systemic inflammation. Chronic low-grade inflammation — often driven by intestinal permeability ("leaky gut") and reduced microbial diversity — has been implicated as a contributing factor in ovulatory dysfunction and implantation failure.[9]
The Vaginal Microbiome
Approximately 80% of reproductive-age women harbor a vaginal microbial community dominated by Lactobacillus species.[10] These bacteria produce lactic acid and hydrogen peroxide that maintain an acidic vaginal pH (3.8–4.5) — an environment that discourages pathogenic overgrowth and supports sperm survival and motility. Disruption of this Lactobacillus dominance — whether from antibiotics, hormonal changes, stress, or dietary factors — is associated with bacterial vaginosis (BV), which affects 20–50% of reproductive-age women and has been linked to reduced fertility and poorer outcomes in assisted reproduction.[1]
The Endometrial Microbiome
Perhaps the most exciting frontier in reproductive microbiology is the discovery that the uterus is not sterile. The endometrium harbors its own microbial community, and landmark research has demonstrated that its composition may influence whether an embryo successfully implants.[3] This has significant implications for both natural conception and IVF — a topic we explore in detail below.
Even the semen microbiome is an emerging research area, with evidence suggesting that male reproductive tract bacteria can influence sperm quality and fertilization potential. While the focus of this article is on female fertility, the microbiome's role in reproduction is clearly a two-way conversation.
The Vaginal Microbiome and Conception
Understanding your vaginal microbiome starts with knowing that not all healthy vaginal environments look the same. A landmark 2011 study identified five distinct vaginal community state types (CSTs) among reproductive-age women, four of which are dominated by a single Lactobacillus species.[4]
| Community State Type | Dominant Species | Key Characteristics |
|---|---|---|
| CST I | L. crispatus | Most protective; pH < 4.5; most stable over time |
| CST II | L. gasseri | Protective; pH 4.5–5.5; stable; lower infection risk |
| CST III | L. iners | Most common; less stable; can shift to dysbiosis |
| CST IV | Mixed anaerobes | Low Lactobacillus; associated with BV and poorer fertility outcomes |
| CST V | L. jensenii | Protective; relatively rare |
From a fertility perspective, CST I (L. crispatus–dominant) is most consistently associated with favorable reproductive outcomes. But research shows that CST II (L. gasseri–dominant) is also protective, maintaining a stable vaginal ecosystem with lower risk for sexually transmitted infections and preterm delivery.[4]
The critical pattern is clear: Lactobacillus dominance matters for conception. Women with CST IV — characterized by low Lactobacillus and high microbial diversity — face increased risk of BV, which is in turn associated with impaired fertility, higher rates of early pregnancy loss, and reduced success in assisted reproductive treatments.[1] If you're experiencing symptoms that suggest a Lactobacillus deficiency, addressing vaginal microbiome health may be a worthwhile consideration alongside other preconception strategies.
Factors That Disrupt Vaginal Flora
Multiple factors can shift a protective Lactobacillus-dominant vaginal microbiome toward dysbiosis: antibiotic use, hormonal fluctuations (including hormonal contraceptive transitions), chronic stress, high-sugar diets, douching, and smoking. Notably, the vaginal microbiome is highly dynamic — one study found spontaneous composition changes in over 35% of women within a single menstrual cycle.[11] This volatility underscores why consistent, long-term microbiome support matters more than short-term interventions.
Best Probiotic Strains for Female Fertility
Not all probiotics are created equal — and when it comes to fertility, strain specificity is paramount. The following strains have the most relevant research for reproductive health, vaginal microbiome support, and the gut–hormone axis that influences conception.
Lactobacillus rhamnosus
L. rhamnosus is among the most extensively studied probiotic species for women's urogenital health. The GR-1 strain designation in particular has been the subject of more than 25 clinical trials and is described in over 60 scientific publications examining vaginal flora restoration.[6] Research demonstrates that oral L. rhamnosus can transit the gastrointestinal tract and influence vaginal microbiota composition, supporting the recovery of Lactobacillus dominance after dysbiosis. For women trying to conceive, maintaining a balanced vaginal ecosystem helps create the acidic, pathogen-resistant environment conducive to sperm survival and healthy implantation. Learn more about the science behind Lactobacillus rhamnosus benefits.
Lactobacillus reuteri
L. reuteri is frequently studied alongside L. rhamnosus for vaginal health applications. Originally isolated from the vagina of a healthy woman, L. reuteri demonstrates strong adhesion to vaginal and urinary tract epithelial cells, displacement of urogenital pathogens, and immune-modulatory activity.[6] The combination of L. rhamnosus and L. reuteri represents one of the most clinically validated probiotic pairings for restoring vaginal flora balance — a key factor in optimizing the reproductive tract environment before conception.
Lactobacillus gasseri
L. gasseri holds a unique position in reproductive health: it is the dominant species in Community State Type II, one of the four protective vaginal microbiome profiles identified in healthy women of reproductive age.[4] This means L. gasseri naturally dominates the vaginal environment of a significant subset of fertile women, maintaining a protective acidic pH and producing bacteriocins that inhibit pathogenic bacteria. Recent research has also demonstrated that specific L. gasseri strains administered orally can survive gastrointestinal transit and successfully colonize the vagina, shifting dysbiotic vaginal communities toward Lactobacillus-dominated profiles.[12] For a deeper look at this strain's clinical applications, see our guide on Lactobacillus gasseri dosage and clinical evidence.
Lactobacillus acidophilus
One of the most well-known probiotic species, L. acidophilus supports vaginal colonization and pH maintenance. It is commonly included in vaginal health formulations and has demonstrated activity against Candida species that can disrupt vaginal flora in women of reproductive age.[7] L. acidophilus also supports gut barrier integrity and immune function — both relevant to the systemic inflammation that can impair ovulation and implantation. Our clinical guidelines article covers Lactobacillus acidophilus dosage recommendations in greater detail.
Lactobacillus plantarum
While less studied specifically for vaginal health than the strains above, L. plantarum has robust evidence for anti-inflammatory activity and gut barrier support — two mechanisms increasingly recognized as relevant to fertility. L. plantarum modulates the balance between pro- and anti-inflammatory cytokines, supports tight junction protein expression in the intestinal lining, and has demonstrated the ability to reduce systemic inflammatory markers.[13] Given the established links between chronic gut inflammation, estrogen dysregulation, and conditions like PCOS and endometriosis that impair fertility, L. plantarum's gut-level benefits can indirectly support reproductive health. Explore the full research profile in our article on Lactobacillus plantarum health benefits.
Bifidobacterium longum
B. longum is a cornerstone gut health species that supports immune regulation, microbial diversity, and short-chain fatty acid production. While not a "vaginal" probiotic per se, its role in gut health is directly relevant to fertility through the estrobolome pathway: a diverse, well-functioning gut microbiome ensures proper estrogen metabolism, which in turn supports regular ovulatory cycles and healthy endometrial development.[5] B. longum has also been included in probiotic formulations studied for hormonal and metabolic improvements in women with PCOS — one of the leading causes of anovulatory infertility.[8] For dietary strategies to support this species, see our article on Bifidobacterium longum in food.
What About Lactobacillus crispatus?
L. crispatus is widely considered the gold-standard vaginal Lactobacillus species and is the most consistently associated with favorable fertility outcomes in clinical studies.[4] However, L. crispatus is extremely sensitive to environmental disruption and notoriously difficult to deliver in oral supplement form — it is primarily a vaginal commensal that doesn't survive gastrointestinal transit well. The strategy for supporting a L. crispatus–dominant vaginal environment is indirect: by maintaining strong Lactobacillus populations through oral supplementation with species like L. rhamnosus, L. reuteri, L. gasseri, and L. acidophilus, you support the broader vaginal ecosystem in which L. crispatus can thrive.
Gut Health, the Estrobolome, and Fertility
The connection between your gut and your reproductive system runs through a critical hormonal pathway that most fertility discussions overlook entirely.
What Is the Estrobolome?
The estrobolome is the collection of gut bacteria — and their genes — capable of metabolizing estrogen. These bacteria produce beta-glucuronidase, an enzyme that reactivates conjugated estrogens in the gut, allowing them to be reabsorbed into the bloodstream rather than excreted. In a balanced microbiome, this process helps maintain stable circulating estrogen levels that support regular menstrual cycles, healthy ovulation, and adequate endometrial development for implantation.[5]
When gut dysbiosis disrupts the estrobolome, the consequences ripple across the entire reproductive system. Reduced microbial diversity can lower beta-glucuronidase activity, leading to decreased estrogen reabsorption and a hypoestrogenic state associated with irregular cycles and poor endometrial receptivity. Conversely, overgrowth of certain beta-glucuronidase–producing bacteria can drive excess estrogen reabsorption, contributing to estrogen-dominant conditions like endometriosis and endometrial hyperplasia.[5]
Key bacterial genera involved in the estrobolome include Bifidobacterium, Lactobacillus, Bacteroides, and Escherichia — underscoring why a diverse, multi-strain probiotic approach supports hormonal balance more effectively than single-strain supplementation.[5]
Gut Inflammation, PCOS, and Ovulation
Polycystic ovary syndrome (PCOS) is one of the most common causes of anovulatory infertility, affecting an estimated 8–13% of reproductive-age women. Research has identified significant differences in the gut microbiota of women with PCOS compared to healthy controls, with reduced microbial diversity and altered Firmicutes-to-Bacteroidetes ratios being frequently observed.[9]
A systematic review of randomized clinical trials found that probiotic and synbiotic supplementation for at least 12 weeks improved insulin sensitivity, reduced androgen levels, and decreased inflammatory markers like hs-CRP in women with PCOS. The most commonly studied and effective strains included L. acidophilus, L. casei, L. rhamnosus, B. longum, Streptococcus thermophilus, and Bacillus coagulans — notably, interventions combining probiotics with prebiotics showed the most robust benefits.[8]
The Role of Prebiotics
Prebiotics — non-digestible fibers that selectively feed beneficial gut bacteria — are an important complement to probiotic supplementation for fertility support. By nourishing Lactobacillus and Bifidobacterium populations in the gut, prebiotics help sustain microbial diversity and support estrobolome function. Inulin-rich sources like Jerusalem artichoke are particularly well-studied for their bifidogenic effects, while acacia fiber (gum arabic) provides gentle prebiotic support that's well-tolerated even by sensitive digestive systems. Inulin supplementation has also been specifically studied for safety and benefits during pregnancy, making it a relevant prebiotic choice for women in the preconception window.[14]
Why Both Gut and Vaginal Support Matter
Most fertility-focused probiotics target either the vaginal microbiome or the gut — rarely both. But the research is clear that these systems are interconnected: gut health drives hormonal balance through the estrobolome, while vaginal Lactobacillus populations create the protective environment conception requires. A comprehensive approach that supports multi-strain probiotic diversity across both ecosystems may offer the most complete preconception microbiome support.
Probiotics for IVF and Assisted Reproduction
For women undergoing in vitro fertilization (IVF) or other assisted reproductive technologies (ART), the emerging research on the endometrial microbiome adds a compelling new dimension to treatment optimization.
The Landmark Endometrial Microbiome Research
In 2016, Moreno et al. published a pivotal study in the American Journal of Obstetrics and Gynecology demonstrating that the endometrium harbors its own distinct microbiome — and that its composition significantly affects IVF outcomes. Among 35 IVF patients, those with a Lactobacillus-dominant endometrium (>90% Lactobacillus) had dramatically higher implantation rates (60.7% vs. 23.1%), pregnancy rates (70.6% vs. 33.3%), ongoing pregnancy rates (58.8% vs. 13.3%), and live birth rates (58.8% vs. 6.7%) compared to those with a non-Lactobacillus-dominant endometrial microbiome.[3]
A subsequent 2022 multicenter study of 342 infertile patients confirmed that a dysbiotic endometrial microbiota composed of pathogenic bacteria — including Gardnerella, Klebsiella, Staphylococcus, and Streptococcus — was associated with unsuccessful reproductive outcomes, while the absence of these pathogens (whether Lactobacillus was present or not) permitted normal implantation.[2]
Optimizing the Microbiome Before Embryo Transfer
A 2025 systematic review and meta-analysis in BMC Pregnancy and Childbirth evaluated the effect of vaginal probiotics on pregnancy rates following embryo transfer. While acknowledging the heterogeneity of existing studies, the review concluded that probiotic supplementation represents a plausible complementary approach for women with documented vaginal dysbiosis before fertility treatment.[15]
Supporting your microbiome before conception sets the stage for healthy vertical microbial transfer to your baby—and after birth, evidence-based infant probiotic strains can continue building your child's microbial foundation.
Research also suggests that oral probiotics can influence vaginal and potentially endometrial microbiota through the gut–vaginal axis. Oral Lactobacillus strains survive gastrointestinal transit and can be detected at the perineal and vaginal levels, where they may promote self-recovery of vaginal Lactobacillus populations through immune modulation and alteration of the local environment.[6]
Recurrent Implantation Failure (RIF): An Emerging Microbiome Connection
Recurrent implantation failure — defined as failure to achieve pregnancy after multiple embryo transfers of good-quality embryos — affects approximately 1 in 10 IVF couples. A 2024 expert consensus involving 14 fertility specialists unanimously agreed that microbial dysbiosis in the reproductive tract, characterized by loss of Lactobacillus dominance, is associated with RIF through increased inflammation and compromised endometrial receptivity.[16] While probiotics are not yet a standard RIF treatment, they represent a growing area of clinical interest as a complementary strategy alongside conventional fertility care.
Supporting Your Microbiome Through the Fertility Journey
Whether you're trying to conceive naturally or preparing for IVF, a balanced gut and vaginal microbiome creates a foundation that supports hormonal health, reduces inflammation, and promotes the Lactobacillus-rich environment that research associates with better reproductive outcomes.
How to Choose the Best Probiotic When Trying to Conceive
The probiotic market is crowded and confusing — especially for women navigating the preconception period. Here's what the evidence suggests you should look for.
Strain Specificity Over Species Labels
A probiotic label that says "Lactobacillus rhamnosus" tells you the species but not the strain — and strain-level differences matter enormously. Different strains of the same species can have entirely different clinical effects. When evaluating a probiotic for fertility support, look for products that list specific, clinically studied strains or that provide a broad spectrum of well-researched Lactobacillus and Bifidobacterium species.
Multi-Strain Formulations
Given that fertility involves both gut health (estrobolome function, inflammation regulation) and vaginal health (Lactobacillus dominance, pathogen resistance), multi-strain probiotics that include diverse Lactobacillus species alongside Bifidobacterium strains offer broader coverage than single-strain products. The research on PCOS and metabolic markers consistently found that multi-strain and synbiotic formulations outperformed single-strain interventions.[8]
CFU Count: More Isn't Always Better
Research-supported doses for vaginal health strains typically range from 1–15 billion CFU per serving. Extremely high CFU counts (50–100 billion) are not necessarily more effective and may cause digestive discomfort, particularly in women with sensitive systems. What matters more than raw numbers is strain viability — whether the organisms are alive and capable of colonization when you take them.
Prebiotic Inclusion
Formulas that combine probiotics with prebiotic fibers support probiotic colonization and sustained gut health benefits. This is especially relevant for fertility support, where sustaining microbial diversity — not just temporarily introducing new bacteria — is the goal. Effective prebiotics include inulin (from Jerusalem artichoke), acacia gum, and fig fruit fiber.
Clean Label: What to Avoid
Many commercial probiotics contain fillers and flow agents that serve manufacturing convenience but provide no benefit to you — and may actively compromise formulation quality. Common additives to avoid include magnesium stearate, silicon dioxide and synthetic flow agents, titanium dioxide, and microcrystalline cellulose. When you're trying to conceive, every ingredient in your supplement should be working for your health — not against it.
MicroBiome Restore: Designed for Whole-Body Microbiome Support
MicroBiome Restore provides 15 billion CFU across 26 probiotic strains — including L. rhamnosus, L. reuteri, L. gasseri, L. acidophilus, L. plantarum, B. longum, and B. bifidum — paired with 9 organic prebiotics like Jerusalem artichoke, acacia, and fig fruit. The formulation is delivered in pullulan capsules — a fermented, prebiotic capsule material — and contains zero magnesium stearate, zero titanium dioxide, and zero microcrystalline cellulose. For the full ingredient breakdown, see our MicroBiome Restore complete guide.
Probiotic Foods That Support Fertility
Dietary sources of probiotics can complement targeted supplementation, though they typically don't provide the specific strains or concentrations that clinical research has studied for reproductive health outcomes. That said, incorporating fermented foods into your daily diet supports overall microbial diversity — which is itself associated with better estrobolome function and hormonal balance.
Beneficial fermented foods include yogurt with live active cultures, kefir, sauerkraut, kimchi, miso, tempeh, and kombucha. Pairing these foods with prebiotic-rich options like garlic, onions, leeks, asparagus, and artichokes further supports the growth and sustainability of beneficial gut bacteria.
Keep in mind that dietary probiotics alone may not be sufficient for women with documented dysbiosis or specific fertility concerns. The strains found in fermented foods are not the same as those studied in clinical fertility research, and their concentrations are variable and unpredictable. Dietary sources are best viewed as a supportive foundation — not a replacement for targeted supplementation when specific microbiome goals are in play.
When to Start Taking Probiotics for Conception
Timing matters. Microbiome rebalancing is not an overnight process — the gut and vaginal ecosystems need consistent support to shift toward optimal composition.
Start 2–3 months before actively trying to conceive. This timeframe allows sufficient time for probiotic populations to establish, for the estrobolome to stabilize, and for vaginal Lactobacillus communities to strengthen. Research on probiotic interventions for vaginal health typically evaluates outcomes over 4–12 week periods, suggesting that at least a month of consistent use is needed before meaningful changes can be expected.[6]
Continue through conception and into pregnancy. Most Lactobacillus and Bifidobacterium strains have well-established safety profiles during pregnancy, and maintaining microbiome support through the first trimester and beyond supports ongoing reproductive health, immune function, and fetal development. For more on safe strain selection during pregnancy, see our article on probiotics and pregnancy.
Consistency matters more than timing of day. Whether you take your probiotic in the morning or evening matters less than taking it reliably every day. Pairing it with a meal that includes prebiotic fibers can enhance survivability and colonization, but the most important factor is simply building the habit.
Discuss with your healthcare provider — especially if you're undergoing fertility treatments. While probiotics are generally safe, your reproductive endocrinologist or OB-GYN can help integrate microbiome support into your overall fertility plan.
Preconception Microbiome Timeline
3 months before TTC: Begin daily multi-strain probiotic and prebiotic supplementation. Focus on dietary diversity — more fermented foods, more fiber.
1–2 months before TTC: Microbiome rebalancing is underway. Vaginal and gut bacterial populations are stabilizing. Avoid unnecessary antibiotics where possible.
Actively trying to conceive: Continue supplementation. The Lactobacillus-dominant environment supports sperm survival, healthy vaginal pH, and favorable conditions for implantation.
Early pregnancy: Maintain probiotic support. Immune modulation and gut barrier integrity remain important through the first trimester and beyond.
Frequently Asked Questions
What probiotics help you get pregnant?
The strains with the most relevant research for supporting a fertility-friendly microbiome include Lactobacillus rhamnosus, Lactobacillus reuteri, Lactobacillus gasseri, Lactobacillus acidophilus, Lactobacillus plantarum, and Bifidobacterium longum. These support vaginal Lactobacillus dominance, gut-level estrogen metabolism, and reduced systemic inflammation — all factors associated with improved reproductive outcomes. Probiotics are not a standalone fertility treatment but may support the microbial conditions favorable for conception.
Do probiotics improve fertility?
Emerging evidence supports the role of probiotics in creating favorable conditions for conception, though they are not a direct fertility treatment. Research associates a Lactobacillus-dominant vaginal and endometrial microbiome with higher implantation and live birth rates in IVF settings, and probiotic supplementation has shown benefits for hormonal balance in women with PCOS. However, the field is still developing, and high-quality randomized controlled trials specifically examining natural conception rates with probiotic supplementation are limited.
Is it true that probiotics and prebiotics help with implantation?
Research suggests a connection. The landmark 2016 Moreno et al. study found that a Lactobacillus-dominant endometrial microbiome was associated with dramatically higher implantation rates compared to a non-Lactobacillus-dominant profile. Synbiotic formulations — combining probiotics with prebiotics — have also shown the most consistent benefits for hormonal and inflammatory markers relevant to implantation. While more research is needed, supporting microbial balance in the reproductive tract appears to be a meaningful factor in implantation success.
What is the best probiotic for women with gut issues and trying to conceive?
Women dealing with gut issues alongside fertility goals benefit most from multi-strain formulations that address both ecosystems simultaneously. Look for products combining diverse Lactobacillus species (for vaginal and gut support) with Bifidobacterium strains (for gut health, immune regulation, and estrobolome function), paired with gentle prebiotics for sustained colonization. Targeted multi-strain probiotics for women that avoid common gut irritants like magnesium stearate and microcrystalline cellulose are particularly appropriate.
How are probiotics meant to help IVF outcomes?
Probiotics may improve IVF outcomes through several mechanisms: restoring Lactobacillus dominance in the vaginal and endometrial microbiome (associated with higher implantation rates), reducing local and systemic inflammation that can impair endometrial receptivity, modulating immune responses at the embryo–endometrium interface, and supporting estrogen metabolism for optimal endometrial development. The goal is not to replace standard IVF protocols but to optimize the microbial environment in which embryo transfer occurs.
What probiotics does an OB-GYN recommend for fertility?
The most clinically referenced strains in reproductive health literature are Lactobacillus rhamnosus (particularly the GR-1 strain designation), Lactobacillus reuteri (RC-14 designation), and Lactobacillus crispatus for direct vaginal applications. For oral supplementation, OB-GYNs familiar with the microbiome–fertility research often recommend multi-strain Lactobacillus formulations that also include Bifidobacterium species. Always discuss specific product choices with your healthcare provider, especially if undergoing fertility treatments.
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References
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