In which specific mammalian organ does the yellow corpus luteum primarily occur?
Heart to initiate the heartbeat
Skin functions as a pain receptor
Brain and connecting cerebral hemispheres
Ovary for the purpose of progesterone secretion
The yellow corpus luteum primarily occurs in the ovary of mammals for the purpose of progesterone secretion. After ovulation occurs, the ruptured follicle in the ovary transforms into a structure called the corpus luteum. The corpus luteum is a temporary endocrine gland that secretes progesterone. It forms a yellowish mass, hence referred to as the yellow corpus luteum. Progesterone is an important hormone involved in regulating the menstrual cycle and supporting pregnancy. It prepares the uterus for the implantation of a fertilized egg and helps to maintain the uterine lining during early pregnancy. Therefore, option 4 is the correct answer.