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Question:

Which hormone is not secreted by a gland in the brain?

A Human chorionic gonadotropin (HCG)
Explaination

HCG is secreted by the trophoblast, part of the early embryo, following implantation in the uterus. GnRH (gonadotropin-releasing hormone. is secreted by the hypothalamus, while LH (luteinizing hormone. and FSH (follicle-stimulating hormone. are secreted by the pituitary gland. GnRH stimulates the production of LH and FSH. LH stimulates ovulation and the production of estrogen and progesterone by the ovary in females, and testosterone production in males. FSH stimulates maturation of the ovarian follicle and estrogen production in females and sperm production in males.