The forecasted days are based on when they think you'll ovulate based on previous months' data. After a few months, you start to see patterns. Most times, the egg is fertilized by sperm already inside. Once your temp rises (O Day), it's usually too late for conception (or, you may still have a chance that day, but it's difficult to know how long the egg will stay viable).
ETA: Your fertile days are considered the (5 ish) days leading up to the O day, the O day, and *maybe* the day after. The range is more helpful for ppl using charting to avoid pregnancy. It's possible for sperm to live inside you for several days. The egg may only have a 24 hr viable window, and sometimes less for some women.
Because you can't predict 100% which day will be your O Day, you're supposed to try during your forecasted days to make sure the sperm is waiting for the egg.
ok thanks but how do I get the ACTUAL on my calendar instead of just forecasted? by just looking at the pattern over a couple of months?
The actual O day won't be confirmed on the chart until after your temp rises and stays above your baseline. The online chart will automatically generate the O day once it sees a shift in temps. The longer you chart, the better you are at predicting days. But, your cycle may throw you a curve ball now and then. I usually O on day 15 or 16, but I actually O'd on day 10 the month before we conceived DD.
To me, the most fascinating thing about charting & learning more about my fertility cycle is that the number of days before your O date may shift, but the number of days from your O date to your first day of bleeding almost never change.
Re: someone please explain fertilityfriend to me
The forecasted days are based on when they think you'll ovulate based on previous months' data. After a few months, you start to see patterns. Most times, the egg is fertilized by sperm already inside. Once your temp rises (O Day), it's usually too late for conception (or, you may still have a chance that day, but it's difficult to know how long the egg will stay viable).
ETA: Your fertile days are considered the (5 ish) days leading up to the O day, the O day, and *maybe* the day after. The range is more helpful for ppl using charting to avoid pregnancy. It's possible for sperm to live inside you for several days. The egg may only have a 24 hr viable window, and sometimes less for some women.
Because you can't predict 100% which day will be your O Day, you're supposed to try during your forecasted days to make sure the sperm is waiting for the egg.
The actual O day won't be confirmed on the chart until after your temp rises and stays above your baseline. The online chart will automatically generate the O day once it sees a shift in temps. The longer you chart, the better you are at predicting days. But, your cycle may throw you a curve ball now and then. I usually O on day 15 or 16, but I actually O'd on day 10 the month before we conceived DD.
To me, the most fascinating thing about charting & learning more about my fertility cycle is that the number of days before your O date may shift, but the number of days from your O date to your first day of bleeding almost never change.