It occurs at any time
no
The hormone that causes ovulation to occur in the menstrual cycle is called luteinizing hormone (LH).
yes
Menstruation typically occurs about 14 days after ovulation.
3days
Yes, for many people it does
after
Estrogen
The hormone that causes ovulation to occur is called luteinizing hormone (LH). LH is produced by the pituitary gland in the brain.
You bet! In fact, it can occur every month for 30 years.
Yes
Ovulation does occur before menarche. Menarche is the term used to describe a girls first period, menstruation will only occur if the woman ovulates. With that said some people will experience vaginal bleeding as a result of hormonal imbalance which will look like menstruation but without ovulation occurring beforehand, and sometimes we call that menarche - because we've no way of knowing if ovulation had occurred.