As this happens, an egg in the ovary develops within a small, fluid-filled cyst called a follicle. The hormones reach their peak in about two weeks. Ovulation begins when the mature egg bursts out of the follicle and is hurtled into the fallopian tube. During this time, it is common for an increase in vaginal secretions. The follicle that remains in the ovary is called the corpus luteum.
Pregnancy happens when the egg is fertilized by sperm, during sexual intercourse.
But having a baby is the last thing on a teenager's mind. When the egg is unfertilized, menstruation always follows ovulation. Since this is your first time having a period, they will be irregular at times. The vaginal bleeding will range from light spotting to heavy bleeding. This is normal, because the cycle will regulate itself in a matter of one to two years.