Difference between estrogen and progesterone

Definition

Estrogen: Estrogen refers to a steroid hormone that is important in the reproductive development in females.
Progesterone: Progesterone refers to a steroid hormone that prepares the uterus for pregnancy.
Production

Estrogen: Estrogen is produced by the growing Grafian follicle.
Progesterone: Progesterone is produced by the corpus luteum.

Secretion

Estrogen: Estrogen is secreted by ovaries prior to ovulation. It is also produced by the placenta during pregnancy.
Progesterone: Progesterone is secreted by the ovaries after the ovulation. It is also produced by the placenta during pregnancy.

Regulation

Estrogen: The secretion of estrogen is regulated by FSH.
Progesterone: The secretion of progesterone is regulated by LH.

Role

Estrogen: Estrogen is involved in the formation and maintenance of secondary sex characteristics. It is also important in bone resorption.
Progesterone: Progesterone is involved in the formation and maintenance of endometrium and uterus.

During Pregnancy

Estrogen: Estrogen is involved in the enlargement of the uterus and breasts during pregnancy.
Progesterone: Progesterone is involved in the reduction of contractility of the uterus and stimulates the growth of mammary glands.