Having sex every day or every other day during your fertile window gives you the best chance of conceiving. That fertile window spans about six days: the five days before ovulation and the day of ovulation itself. There’s no magic number of times, but aiming for three to six sessions spread across those days covers your bases well.
Every Day vs. Every Other Day
Both approaches work. The American College of Obstetricians and Gynecologists recommends sex every day or every other day during the fertile window, and pregnancy rates are similar with either approach. The difference is small enough that it comes down to what feels sustainable for you and your partner.
One common concern is that daily sex might deplete sperm. Some data suggests sperm quality peaks after two to three days without ejaculation, but men with normal sperm counts maintain healthy concentration and motility even with daily ejaculation. If there’s a known sperm count issue, every other day may be a reasonable choice. Otherwise, daily sex won’t hurt your chances.
Which Days Matter Most
Not all days in the fertile window carry the same odds. The highest conception rates come from sex on the two days before ovulation and the day of ovulation itself. Having sex two days before ovulation, for example, carries roughly a 26% chance of pregnancy per cycle. By contrast, sex just one day after ovulation drops to about 1%.
This lopsided pattern exists because of biology. Sperm survive three to five days inside the reproductive tract, so they can be waiting in the fallopian tubes before the egg arrives. The egg, however, lives for less than 24 hours after release. That means sperm already in place when ovulation happens is the ideal scenario, and sex before ovulation is more valuable than sex after.
In practical terms, this means you don’t need to time things perfectly to the hour. Having sex a few times in the days leading up to ovulation is more effective than trying to hit ovulation day exactly.
How to Identify Your Fertile Window
Ovulation typically happens around day 14 of a 28-day cycle, but cycles vary. Two reliable methods can help you narrow down timing.
Ovulation predictor kits (OPKs) detect a surge in luteinizing hormone in your urine. This surge begins about 36 hours before ovulation, and the egg is typically released 8 to 20 hours after the hormone peaks. A positive test means ovulation is likely within 12 to 48 hours. Once you see a positive result, that day and the next one or two days are prime time for sex. Ideally, you’ve already been having sex every day or two before the positive shows up.
Cervical mucus tracking is free and surprisingly informative. As you approach ovulation, discharge becomes slippery, stretchy, and clear, resembling raw egg whites. This type of mucus helps sperm travel more efficiently. When you notice it, you’re in your most fertile phase. Once the mucus turns sticky or dry again, ovulation has likely passed.
A Realistic Schedule
If you know roughly when you ovulate, a simple approach is to start having sex every day or every other day beginning about five days before your expected ovulation. For someone with a 28-day cycle, that means starting around day 9 or 10 and continuing through day 14 or 15. That gives you roughly three to six opportunities across the window.
If you don’t track ovulation at all, having sex two to three times per week throughout your cycle will usually land some of those attempts in the fertile window. It’s less precise but still effective for many couples. More than half of healthy couples conceive within the first six months of trying.
Why More Isn’t Always Better
Having sex multiple times in a single day doesn’t meaningfully increase your odds compared to once that day. The goal is coverage across the fertile window, not volume on any single day. Turning sex into a rigid schedule can also create stress that makes the process harder emotionally, and for some people, physically. If every-other-day feels more manageable, the data supports that approach just as well.
The bottom line: consistency across the fertile window matters more than hitting one perfect moment. Three well-timed sessions spread over five or six days can be just as effective as six consecutive days of effort.