What does estrogen do?

Estrogen, which is found most abundant in women, preforms a wide variety of functions, including: the development of a woman's sexual characteristics during puberty, regulation of the menstrual cycle, and it also is responsible for many of the physical and emotional tumult that a girl goes through during her period. Just before ovulation (a period) a woman's amounts of estrogen and progesterone (another major female hormone) severely drop, triggering the many side affects of a period.