Find over 25,000 psychological definitions


progesterone

n. a hormone, secreted mainly by the corpus luteum in the ovary, that stimulates the proliferation of the endometrium (lining) of the uterus required for implantation of an embryo. If implantation occurs, progesterone continues to be secreted—first by the corpus luteum and then by the placenta—maintaining the pregnant uterus and preventing further release of egg cells from the ovary. It also stimulates development of milk-secreting cells in the breasts.

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

January 18th 2025