This is the cycle when a females body releases an egg and if it is now fertilised then the egg will "decay" (period). This cycle goes on every 28 days.
yes, women menstrate every 28 or 21 days.
how would someone is pregnant not menstrate
probably when she was ether 12 or 13.
please answer mee:(
Yes she can but i don't think it is very common.
yes they do because they bleed
No. Horses go into estrous, they do not menstrate like human women do.
Dogs get the heat twice a year.
no. but they are almost constantly fertile, so any time they are exposed to male, they could become pregnant.
In some cases when you are first pregnant you can still menstrate but I don't know how common that is.
No, you become fertile after your period. ITs called a menstruel cycle because you menstrate first, then ovulate.
it means you need to go to the doctor. a woman is suppose to menstrate every 28 days