Another organ that has endocrine function are our gonads. The gonads, which are the testes
in males and the ovaries in females, produce the same steroid sex hormones as those of the
adrenal cortex. The ovaries in the females are going to produce estrogen and progesterone.
Estrogen is going to be responsible for the maturation of our reproductive organs. The
appearance of secondary sexual characteristics and with progesterone it is also going to
cause breast development and the cyclic changes in the uterine mucosa that we refer to as
the menstrual cycle. The testis, which is the gonads in males, is going to produce testosterone.
This is going to initiate the maturation of our male reproductive organs and cause the
appearance of male secondary sexual characteristics as well as contribute to the male sex
drive. It's necessary for the normal production of sperm and maintains the reproductive
organs in a functional state. Another structure is the placenta, which is found during
pregnancy. The placenta is going to be responsible for the secretion of estrogens,
progesterone, and a human chorionic gonadotropin which is what is tested for in a pregnancy
test since it is only present during pregnancy.