Finasteride (Propecia and generics) is one of the most common prescriptions for men with hair loss — and one of the most searched questions once a couple starts trying: does it affect fertility, and should you take a male fertility supplement while on it? Here’s a practical, non-alarmist guide to discuss with your doctor.
This is educational, not medical advice. Never stop or change a prescription without talking to your prescriber. For the couple-level plan, see fertility supplements for couples.
1. What’s known about finasteride and sperm
Finasteride lowers DHT, a hormone derived from testosterone. Most men on the hair-loss dose father children without problems, but the product labeling notes decreased ejaculate volume in some men, and small studies and case reports describe lower sperm counts in some men while taking it — often improving after stopping. The effect seems to vary a lot from person to person, which is why a semen analysis beats guessing.
2. Questions to bring to your doctor
- Should I get a baseline semen analysis now that we’re trying?
- Would pausing finasteride make sense for us, and for how long?
- If I pause, what’s the plan for my hair — are there alternatives to discuss?
- When should we retest?
- Is there anything else on my medication list that matters for sperm health?
Already have results? Our guide to what to do after an abnormal semen analysis explains the numbers.
3. Why everything runs on a 90-day clock
Sperm take roughly 74 days to develop, plus time to mature and travel. That means any change — pausing a medication, sleep, heat, alcohol or starting a supplement — needs about 3 months before it can show up in a semen analysis. Plan your retest around that window rather than week by week. More detail: how long until a male fertility supplement shows up in a semen analysis.
4. Where a male fertility supplement fits
A supplement does not cancel out a medication effect, and it isn’t a reason to skip the doctor conversation. What it can do is support overall sperm health while you follow your doctor’s plan:
| Your situation | Often considered |
|---|---|
| On finasteride, normal semen analysis | AGO Dad for general sperm-health support |
| Paused finasteride with your doctor, waiting to retest | AGO Dad for a full 90 days |
| Low count or motility on testing | AGO Dad + AGO Sea Oyster, with your doctor’s follow-up |
| Partner also trying | Couple combo: AGO Mom + AGO Dad |
Avoid testosterone boosters or TRT while trying unless your doctor directs it — see testosterone booster vs male fertility supplement.
5. A simple 90-day plan for couples
| When | Him | Her |
|---|---|---|
| Week 0 | Doctor chat + baseline semen analysis | Prenatal + cycle tracking |
| Days 1–90 | Follow the medication plan; AGO Dad daily; cut heat, nicotine and heavy drinking | Prenatal + AGO Mom if it fits |
| Around day 90 | Retest and review with your doctor | Review cycles together |
Need help choosing how many bottles to order for the full window? See the 90-day buying guide. Results vary and no supplement guarantees pregnancy. Get a free personalized plan.
FAQ
Does finasteride cause male infertility?
Most men on the hair-loss dose have children without problems, but some men show lower ejaculate volume or sperm counts while taking it, often improving after stopping. A semen analysis is the best way to check your own situation; talk to your doctor.
Should I stop finasteride when we start trying to conceive?
That’s a decision for you and your prescriber. Some couples choose to pause and retest; others continue if testing looks normal. Don’t stop or change a prescription on your own.
How long after stopping finasteride should I retest?
Sperm take roughly 74–90 days to develop and mature, so many doctors retest around 3 months after a change. Follow your doctor’s timing.
Can I take AGO Dad while on finasteride?
AGO Dad is a dietary supplement designed to support sperm health. Bring the label to your doctor or pharmacist so they can review it with your medication list.
Will a male fertility supplement reverse the effects of finasteride?
No supplement can promise that. AGO Dad is designed to support overall sperm health alongside your doctor’s plan, and results vary.
Do you ship to the US and Canada?
Yes. AGO ships to the US and Canada; the care team can confirm delivery times for your area.