Some fertility trackers use your average cycle length and an estimated timeframe for ovulation to pinpoint when your fertile window might be. But your peak fertility only lasts for about three days. Which days are those, exactly? According to three different studies each with slightly different findings detailed in our fertility calendar , here are your most fertile days, ranked in order:.
The most important thing to note here is that you can conceive anytime during the 5 days before ovulation and on ovulation day itself.
Within your 6-day fertile window, the days before ovulation are your most fertile. Yes, but your chances are better in the days leading up to ovulation. As the table above shows, there are varying chances of conception on each day, but conception can happen anytime in the fertile window. The good news is that s perm can live inside the female reproductive tract for up to five days.
According to this study , millions of sperm are deposited into the vagina during sex, but only a few thousand of them will reach the Fallopian tubes.
These remaining sperm will wait for ovulation to occur and once it does, will fight their way to the just-released egg. But the point is: somehow when the egg is released, the sperm know they have an important job to do. The good news is, there are a number of reliable ways to narrow in on your fertile window. Eight of 10 of the websites that gave an ovulation date named it correctly, and 20 out of 23 apps that gave a date also got it right.
All of the websites and apps included at least one fertile day in their predicted window. Still, there was wide variance in the predicted fertile windows. One app predicted a day fertile window, while two apps and two websites predicted a four-day window. Some appeared really arbitrary and some had really wide gaps of day windows. Setton says some of the apps may not be associated with a medical institution and may not be using the gold standard measurement to determine fertility.
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