Most couples start fertility supplements the way they start a gym membership: one of you buys something, the other means to, and three months later nobody is sure whether it did anything. A his-and-hers plan only works if both halves start on the same day and get judged on the same date.
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This is the 90-day plan we walk couples in the US and Canada through — what to buy, what to book, what to check at each checkpoint, and what to change if nothing has happened by day 90.
Why 90 days is the unit, not 30
Ninety days is not marketing. It is the shortest honest window in which either half of a couple can expect nutritional groundwork to have been laid.
- His side is a production line. Sperm take roughly 72–90 days to develop and mature. Anything he starts today shows up in a semen analysis about three months from now — not in three weeks. The full timeline is in how long until a male fertility supplement shows up in a semen analysis.
- Her side is a queue. An egg released this month spent the previous few months maturing. That is the window nutritional support can sit alongside — see egg-cell wellness.
- Three cycles is also enough data to judge. One cycle tells you nothing; three tells you whether timing, not biology, was the problem.
So the plan runs in one block, both of you, same start date, same review date. Our general dosing-duration guidance is in how long to take AGO supplements.
Days 1–7: buy once, book twice
The first week is the only one with real admin in it. Do all of it now so months two and three are just habit.
- Buy both halves together. The ready-made starting point is the Mom + Dad his-and-hers starter combo. Buying one half and “seeing how it goes” is how couples lose a quarter.
- Book his semen analysis. Cheap, quick, non-invasive, and a male factor is involved in roughly a third to a half of couples. Do it at the start of the block so you have a baseline to compare against. Background: male fertility and sperm health.
- Book her baseline bloods — thyroid and prolactin, plus day-21 progesterone if cycles run long, and AMH if she is 35 or older. See thyroid and conception and AMH and egg-cell wellness.
- Start tracking properly. LH strips plus cervical mucus, not an app average — cycle tracking.
- Tie both bottles to the same meal. Same trigger, same time, both of you. It is the single biggest predictor of whether either of you is still taking them in week ten.
See the full AGO range and combo pricing →
The his-and-hers AGO combo we would build
The honest limit first: AGO products are dietary supplements designed to support everyday reproductive wellness. They do not treat any condition, do not replace fertility care and do not guarantee any outcome. The wider framework for two people is in fertility supplements for couples.
- Hers — AGO Mom. The daily anchor for ovulation and cycle wellness across the full block. Against what may already be in the cupboard: Mom vs prenatal vitamins.
- Hers, add-on — AGO Eva when cycles are long or unpredictable (hormonal and cycle wellness), or Mẫu Nguyệt Đà when periods are heavy or painful (cycle and uterine wellness). If fibroids are on a scan, start with AGO Mom vs AGO Tumor and types of fibroids.
- His — AGO Dad. Male reproductive wellness across his 90-day turnover. Over 40: male fertility after 40. Against a general multivitamin: Dad vs a men’s multivitamin.
- His, add-on — Hàu Biển (Sea Oyster) when flat energy and stamina are the daily complaint: Sea Oyster for everyday vitality. Choosing between them: Dad vs Sea Oyster.
Take with food at the label dose and add one product at a time so you can tell what suits you. Stacking rules are in can you take AGO supplements together, prices in the combo pricing guide, and ordering in where to buy in the US and Canada.
Days 8–90: the habits that do the quiet work
- Every other day across the fertile window beats chasing one perfect day — more forgiving of work schedules, and far less pressure on both of you.
- Heat and exposure for him. Laptops on laps, long hot commutes, saunas and hot tubs, plus smoking and vaping — see heat, smoking and sperm wellness.
- Alcohol and caffeine for both. The realistic targets are in caffeine, alcohol and fertility.
- Sleep and stress. A consistent sleep block does more than most bottles: sleep and hormones, stress and fertility.
- Food first, supplements second. Start with fertility nutrition, and check vitamin D if you get little daylight.
- Divide the admin. One of you owns tracking, the other owns reordering and appointments. Resentment is the most common reason a 90-day plan dies at week six.
Day 90: the review, and what to change
Put the date in both calendars now. At the review, answer four questions honestly.
- Did you actually cover the windows? If not, the plan was never tested — run another block with better timing before changing any product.
- What did his re-test show? A repeat semen analysis at roughly 90 days is the one number in this whole plan that moves and can be measured. Expect normal variation between samples.
- Are her cycles more predictable? If not, that is a conversation for a doctor, not a bigger stack.
- Is it time to escalate? Standard US and Canadian guidance: see a specialist after twelve months of trying under 35, six months at 35 or older. Go sooner for absent periods, no LH surge, known fibroids or endometriosis, a previous ectopic, or a clearly abnormal semen analysis. Next steps if you are already past that mark: six months of trying and while waiting for IVF.
Want us to match the two halves to your ages, test results and budget before you buy? Our care team does this every day and will say plainly when a question belongs with your doctor: book a free consultation. Free, and no pressure to order.
More on this: The his-and-hers starter combo · Couples over 40 · Fertility supplements for couples