2024-11-15
11 分钟What the fertile window is is going to be the five days before and then the day you ovulate.
So an egg lives for 24 hours.
The five days before you ovulate.
Okay.
Okay.
So the five days before you ovulate, and then the day that you ovulate, the egg lives for 24 hours.
It has to be fertilized while it is in the fallopian tube.
In those first 24 hours, sperm can live in the female reproductive tract for five days.
So that is why we will tell people to have sex before and then during ovulation, put some of that sperm from the locker there a little bit earlier and then get some there right at the time when you're ovulating to see if you can fertilize that egg.
If we think about understanding when your fertile window is based on your cycle length.
So if we say your cycle is the entire process and then your period is just the bleeding days, the entire process.
If your cycles are on average 28 days, the corpus luteum lives 14 days.
So 28 minus 14, you on average would ovulate on day 14.
So the five days before and then day 14 are going to be your most fertile days to try to target intercourse or avoid if you don't want to be pregnant.
And if your cycles are 35 days, though, it's very different.
Right.
Because now 35 days minus 14 is going to be 21.
Here you go, 21.
So your fertile window, or for that person is going to be cycle day 21.
So now the five days before and day 21.