IVF · 7 min read · 2026-05-16
IVF Supplements: What to Take and What to Skip
When you are doing IVF, the instinct to optimize everything is completely understandable. You are spending enormous resources — financial, emotional, physical — on a process where every variable feels consequential. Supplements feel like something you can control. And to a degree, you can, but the evidence is narrower and the protocol constraints are tighter than in most other contexts.
The honest framing: your reproductive endocrinologist's protocol is primary. The medications you are prescribed — FSH, LH, GnRH agonists or antagonists, progesterone — are the intervention. Supplements are preparation before stimulation starts and support during the post-transfer period if your clinic approves them.
What the evidence does support, within those constraints, is a targeted and relatively short list of nutrients that improve the conditions for successful IVF. This guide is not about adding everything that might help — it is about getting the right few things right, at the right time, without interfering with your protocol.
Before Stimulation: The Pre-Protocol Window
The most impactful supplement window is the three months before your retrieval cycle starts — before stimulation drugs begin. During this time, the follicles that will be retrieved are already developing, and the conditions inside them are being shaped by what is circulating in your body now.
CoQ10 at 200mg daily supports mitochondrial function in developing oocytes. The mechanism is established: oocyte meiosis is ATP-intensive, CoQ10 is essential for ATP production, and CoQ10 levels decline with age. Women over 35 may benefit from 400mg. This is the most evidence-supported intervention in the pre-IVF window.
Methylfolate 400mcg ensures adequate active folate for DNA methylation and cell division. Using methylfolate rather than synthetic folic acid bypasses the MTHFR conversion step — relevant because roughly 40% of women have variants that reduce conversion efficiency.
Omega-3 EPA+DHA at 500mg supports membrane fluidity in developing eggs and provides anti-inflammatory support throughout follicle development. These three — CoQ10, methylfolate, omega-3 — are the core pre-stimulation stack. Add vitamin D if you test deficient.
Vitamin D: The IVF Success Factor Most People Miss
Vitamin D is one of the most consistently supported supplements in the IVF literature, and deficiency is remarkably common. Multiple studies have found that women with vitamin D deficiency have lower IVF success rates — specifically lower clinical pregnancy rates and live birth rates — compared to women with adequate levels.
The mechanism is specific: vitamin D receptors (VDRs) are expressed in the endometrium, and vitamin D plays a role in endometrial preparation for implantation. One of the most important factors in IVF success beyond embryo quality is endometrial receptivity — and vitamin D is part of that picture.
Target serum 25-OH vitamin D above 40 ng/mL before your cycle if possible. At 2000 IU daily, most deficient women can correct to adequate levels in 8-12 weeks. Testing matters here because supplementing in a person who is already sufficient provides no additional benefit — the goal is to correct deficiency, not push to excessive levels. This is one of the most actionable nutritional interventions with direct IVF outcome data.
The Vaginal Microbiome: An Underappreciated Factor
This is the one factor most IVF patients and even many clinicians do not discuss: the vaginal microbiome is an independent predictor of IVF success. Studies using 16S rRNA sequencing of endometrial and vaginal microbiomes have found that Lactobacillus-dominant microbiomes are associated with significantly higher clinical pregnancy rates compared to non-Lactobacillus-dominant profiles.
Lactobacillus dominance maintains an acidic vaginal environment that protects against pathogenic colonization and may directly support endometrial receptivity. While prebiotic and probiotic interventions for the vaginal microbiome are still an emerging area, the evidence for the predictive value of microbiome composition is solid.
This does not mean take any probiotic — it means consider asking your REI whether vaginal microbiome testing is appropriate for your protocol, particularly if you have had multiple failed transfers. Some academic IVF centers are beginning to incorporate this into their workup. It is not a supplement recommendation per se — it is a system worth knowing about.
What to Remove and When to Stop
The cleaner rule for IVF: when in doubt, leave it out. During stimulation, the drugs your clinic prescribes are doing precise hormonal work. Adding unvetted supplements introduces variables without a corresponding benefit that justifies the risk.
Remove before starting any IVF cycle, and do not resume without REI approval: vitex, maca, rhodiola, saffron, ashwagandha, black cohosh, high-dose vitamin A (retinol form), berberine. These all modulate hormones, blood sugar, or liver metabolism in ways that can interfere with your protocol.
At the start of stimulation, pause: CoQ10, NAC, high-dose antioxidants, omega-3s, melatonin. Continue only with REI approval: methylfolate, vitamin D.
Post-retrieval and during the luteal phase support period, your clinic may add progesterone, estradiol, and other medications. Work with them on what to layer back in. The preparation window before stimulation is where the nutritional work lives — the stimulation window is where you get out of the way.
The bottom line
IVF is not a context for maximum supplementation — it is a context for targeted, protocol-respecting preparation. Selene builds your pre-IVF stack around your hormonal profile and timeline, and flags what to pause when stimulation starts. Take the profile quiz and get a protocol that works with your clinic, not around it.
Questions
What supplements should I take before IVF?
Before stimulation starts, the evidence supports: CoQ10 200-400mg (oocyte mitochondrial function), methylfolate 400mcg (DNA methylation), vitamin D3 2000 IU if deficient (endometrial receptivity), and omega-3 EPA+DHA 500mg (membrane support and anti-inflammation). These should be started three months before your planned retrieval cycle and reviewed with your REI. Once stimulation begins, most should be paused unless your doctor approves continuation.
Does vitamin D affect IVF success rates?
Yes — vitamin D deficiency is consistently associated with lower IVF success rates across multiple studies. The mechanism involves vitamin D receptors in the endometrium that affect implantation-related gene expression. Getting serum 25-OH vitamin D above 40 ng/mL before your cycle is one of the most actionable, evidence-supported interventions available. Test your levels first — supplementing from an already-sufficient baseline does not improve outcomes further; the goal is to correct deficiency.
Can I take CoQ10 during IVF stimulation?
Generally no — at least not without explicit REI approval. During stimulation, the injectable medications your clinic prescribes are doing precise hormonal work, and most reproductive endocrinologists recommend pausing supplements during this phase to avoid potential interference. CoQ10 is most valuable in the three months before stimulation starts, when developing follicles are in the growth phase. Once retrieval is complete, you can discuss with your clinic what to resume.
What supplements should I avoid during IVF?
Avoid entirely during IVF: vitex, maca, rhodiola, saffron, ashwagandha, black cohosh, dong quai, berberine, and high-dose retinol. These modulate hormones, liver enzymes, or blood sugar in ways that can interfere with your protocol. Pause during stimulation unless REI approves: CoQ10, NAC, high-dose antioxidants, omega-3s, melatonin. The cleaner the field during your protocol, the better — supplements are preparation, not an active intervention during treatment.
Build an evidence-based IVF protocol.
Selene's personalization engine maps your hormonal profile to peer-reviewed ingredient stacks, adjusted for your cycle phase and symptom cluster.
View the IVF clinical profile →