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The Complete IVF Prep Guide: A 90-Day Evidence-Based Playbook

A typical IVF cycle has three to five clinical touchpoints over a 90-day window. The clinic side of the protocol gets all the attention: the medications, the ultrasounds, the bloodwork, the retrieval. But about 75% of what happens to oocyte quality, sperm quality, and uterine receptivity during that window is operating outside the clinic, inside your kitchen, bathroom, and routine.

This guide pulls together everything we have evidence for, sequenced as a 90-day checklist. Each section links out to a deeper article on the specific topic.

Where the leverage actually lives

The 90 days before retrieval are the oocyte maturation window. Primordial follicles that have been dormant in the ovary for years begin a final maturation push in roughly that timeframe. The factors that affect a follicle's quality during that final push are the modifiable ones: micronutrient status, oxidative stress, environmental endocrine disruptors, and inflammation.

The same timeline applies on the male side, but the cycle is shorter and more responsive. Spermatogenesis runs about 74 days from start to ejaculation. That means most of what is going to show up in the semen sample on retrieval day was being built during the 2.5 months prior. The male partner's role is dramatically understated and most of the leverage there is also modifiable.

The wellness-industry version of "IVF prep" is a fourteen-bottle supplement stack, a juice cleanse, and a tarot reading. The reproductive-endocrinology version is much shorter, much cheaper, and much better-supported by evidence. This guide is the second version.

The four buckets

Everything below collapses into four buckets:

What you add (supplements, the right prenatal, vitamin D, CoQ10)
What you remove (PFAS in cookware and water, certain skincare ingredients, smoking, hot tubs)
What you measure (vitamin D, AMH, FSH, hormone panel, sperm parameters if there is a flag)
What you wait on (retinoids, certain skincare actives, certain over-the-counter medications)

Each subsequent section maps to one of those buckets.

Bucket 1: What you add

A high-quality prenatal vitamin with methylated folate

This is the single most important supplement. Start at least 90 days before stimulation. The features that matter: methylated folate (not folic acid), choline at 250 mg or higher, third-party heavy-metal testing, iron in a tolerable form.

Our top picks are Needed Prenatal Multi Essentials, FullWell Prenatal, and Ritual Essential Prenatal. The full ranking with the rubric is in the prenatal vitamin guide.

DHA fish oil 200 to 600 mg per day

Most prenatals are under-supplied on DHA. Add a separate fish oil. IFOS certification matters. Nordic Naturals Prenatal DHA is the category standard.

Vitamin D3 to maintain serum 25-OH-D above 30 ng/mL

Most women in the northern US need 2000 to 4000 IU per day. This one you actually want to test, not guess. See the testing section below.

CoQ10 ubiquinol 200 to 400 mg per day

The supplement with the most consistent evidence base for oocyte quality. Effect is most pronounced in women over 35. Ubiquinol is the bioavailable form.

Magnesium glycinate 200 to 400 mg in the evening

Helps with sleep, anxiety, leg cramps, and constipation, all common during stimulation and the two-week wait. Glycinate form matters because citrate has a laxative effect.

Full supplement playbook with doses, brands, and what to skip.

If you want a single packaged option that covers both partners with one purchase (CoQ10, methylated folate, zinc, vitamin E, and the other antioxidants on both sides), EuNatural's Conception bundle is a budget-tier all-in-one. It does not replace the prenatal, DHA, and vitamin D, but it covers the male-side antioxidant stack and a baseline female-side blend in one order.

Bucket 2: What you remove

PFAS in cookware and drinking water

PFAS exposure during the 90-day oocyte maturation window is associated with reduced oocyte yield, lower fertilization rates, and elevated miscarriage risk. Two changes drive 70 to 85% of the reduction:

Replace non-stick pans with cast iron, stainless steel, or PFAS-free ceramic
Install a reverse osmosis water filter

The full PFAS-proofing playbook goes deeper, including the supporting changes (paper-receipt avoidance, glass food storage, "Dirty Dozen" produce).

Skincare actives that need to come off your shelf

The same actives you would avoid during pregnancy. Retinoids, salicylic acid above 2%, hydroquinone, chemical sunscreens, formaldehyde-releasing preservatives. The list and what to swap in is in the IVF skincare guide and the retinoid timing guide specifically.

Endocrine disruptors in personal care

Synthetic fragrance, parabens, phthalates. Switch to fragrance-free or naturally-scented personal care during the 90 days. The pregnancy-safe skincare ranking and non-toxic deodorant ranking cover the swaps.

Smoking, vaping, cannabis, and heavy alcohol

All four are associated with reduced oocyte quality and elevated sperm DNA fragmentation. Stop at the start of the 90-day window. Moderate alcohol (under 4 drinks per week) does not show clear effects in studies but most clinics recommend cutting to zero during stimulation.

Hot tubs and saunas for the male partner

Testicles operate 2 to 3 degrees Celsius below core body temperature. Sustained heat reduces sperm production. Stop hot tubs and saunas for the full 74-day spermatogenic cycle. The full male prep playbook covers cycling, laptops, and clothing as well.

Bucket 3: What you measure

Most reproductive endocrinologists will run their own panel at the first consult. If you want a head start, or you are still weeks away from getting in, these direct-to-consumer tests are inexpensive and let you walk in with data:

25-Hydroxy Vitamin D, single most actionable baseline
AMH (Anti-Müllerian Hormone), primary ovarian reserve marker
FSH, LH, Estradiol, cycle day 3 hormones
Comprehensive Female Hormone Panel, adds thyroid markers and prolactin
Hemoglobin A1C, relevant if you have PCOS, family history of diabetes, or BMI above 30
At-home STI screen via empowerDX, required at most clinics, skip a clinic visit by pulling this first

Results land in 2 to 5 business days. Bring them to the consult.

Bucket 4: What you wait on (timing matters)

Retinoids: 30-day washout before stimulation

Stop prescription tretinoin, tazarotene, adapalene, and over-the-counter retinol at least 30 days before stimulation begins. Resume only after a negative beta-hCG, or after delivery and weaning if positive. Full timing details in the retinoid guide.

Certain herbal supplements

ASRM specifically advises against vitex, dong quai, and red clover during stimulation because they can interfere with the hormonal protocol. Ashwagandha, melatonin, and "fertility blends" with undocumented ingredients should also be paused.

High-dose vitamin A

The retinoid story extends to high-dose oral vitamin A (anything over 10,000 IU per day). Most prenatals supply 1500 to 4000 IU as preformed vitamin A plus more as beta-carotene, which is safe. Avoid additional vitamin A capsules.

The 90-day timeline

If you are starting from scratch, here is the sequencing:

Day 1 to 7 (housekeeping)

Order a prenatal with methylfolate
Order DHA fish oil, CoQ10 ubiquinol, magnesium glycinate
Order baseline labs from the list above
Begin replacing non-stick cookware
Order a reverse osmosis water filter

Day 7 to 30 (the swap)

Switch personal care to fragrance-free and paraben-free
Stop retinoids and other on-the-avoid-list skincare actives
Start the supplement stack
Stop smoking, vaping, cannabis (if applicable)
Cut alcohol to zero
Stop hot tubs and saunas (male partner)

Day 30 to 75 (compound)

Habits are now automatic
Receive baseline lab results; share with RE
If male partner showed elevated FSH/LH or any concern, schedule a urology consult

Day 75 to 90 (final stretch)

Final clinic appointments
Confirm all supplement doses are correct
Confirm no new exposures (new candle, new cleaning product, new cosmetic)
Hydration up, sleep prioritized

What the clinic does not tell you (but matters)

There is a category of changes that are not on most clinic intake forms because they fall outside the prescribing pharmacist's domain. They are worth doing anyway:

The cookware swap. RE will not ask.
The water filter. RE will not ask.
The skincare audit. RE will not ask unless you raise it.
The male partner's 74-day cleanup. RE may ask, but rarely directs.
Magnesium during the two-week wait. RE typically will not recommend, but the evidence on tolerability is decent. See the magnesium guide.

None of these are oppositional to the medical protocol. They are complementary. The point is that they are your job to coordinate, not the clinic's.

The honest bottom line

A 90-day evidence-based IVF prep program is not glamorous. It is:

A prenatal vitamin
Three or four extra supplements
A different set of pans
A different water filter
A simpler skincare routine
A male partner who is also doing the work
A handful of blood tests

That stack is everything that has independent evidence behind it. Everything beyond that, the wellness-industry add-ons, the influencer regimens, the herbal "support" blends, has either no evidence or actively conflicts with the protocol.

The technical foundation matters. The clinical protocol matters. But what happens in the 89 days you are not at the clinic also matters, and is the part most patients underestimate.

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Medical disclaimer: This article is for informational purposes only and is not medical advice. Always consult your reproductive endocrinologist before changing supplements, exposures, or routines during fertility treatment.