Ovary is the main organ of female reproductive system. Three types of hormones are secreted from the ovaries.
(i) Progesterone: Progesterone hormone is secreted from the corpus luteum.
(ii) Relaxin: Relaxin hormone is secreted from bile glands. It prevents uterine contractions.
(iii) Estrogen: There are three types of estrogen. Estradiol, estrone and estriol. It causes symptoms in women. Increases mammary glands. Body softens the skin.