How the menstrual cycle works?

If she doesn’t know how her menstrual cycle works then she really shouldn’t be having unprotected sex… When a girl gets her period, she usually bleeds for 4-7 days. This varies between girls because everyone is different. Since your friend is probably young like you, her period isn’t regular. She may think it is but its not. Her body is still developping. 14 days after you finish your period(the last day of your period) you will begin ovulating again. Ovulating means producing an egg. Every month an egg is produced, your uterus prepares for a baby by lining it with tissue and blood to act as a cushion. If your egg is fertilized by sperm at the right time (more or less 14 days after your last period), you will be pregnant. If the egg is not fertilized, the blood and lining will come out through your vagina.

Its important to remember that no matter when you have sex there is always a chance of getting pregnant. Unprotected sex at your age is dumb. plaing and simple, use a condom, it makes no difference for the girl, if your guy doenst want to use one, he doesnt care about your body and the fact you might get pregnant. Tell him, with a condom or not at all.

Also keep in mind, sperm can live a few days in the vagina, and if the egg is released withing that time, it can still fertilize it.

be smart and use protection, reduce the possiblility of pregnancy. If the boy pulls out, there is a thing call pre cum that he releases that still has sperm in it.

To sum it up, 14 days after your period is when you are MOST fertile ( most likely to get pregnant), right after your period there is a lower chance but dont risk it! He will still enjoy sex with a condom

hope I helped