This peptide from the anterior pituitary stimulates the maturation of Graafian follicles in the ovary in females and spermatogenesis in males, enhancing the production of androgen-binding protein by Sertoli cells.

Follicle-stimulating hormone

This peptide is produced in the kidney and regulates pain.

Enkephalin

This peptide from the pancreas regulates pancreatic secretions and affects hepatic glycogen levels and gastrointestinal secretions.

Pancreatic polypeptide

This peptide produced by the hypothalamus regulates the pituitary gland and inhibits the release of gonadotropins.

Gonadotropin-inhibiting hormone

This peptide from the hypothalamus inhibits the release of growth hormone and thyrotropin from the anterior pituitary and suppresses various gastrointestinal hormones while lowering the rate of gastric emptying.

Somatostatin

This peptide from the anterior pituitary stimulates the synthesis of corticosteroids and androgens in the adrenal cortex.

Adrenocorticotropic hormone (or corticotropin)

This peptide from the placenta increases the production of insulin and IGF-1, as well as insulin resistance and carbohydrate intolerance.

Human placental lactogen

This peptide is produced by the hypothalamus and stimulates the release of FSH and LH from the anterior pituitary.

Gonadotropin-Releasing Hormone

This peptide from the hypothalamus stimulates the release of prolactin from the anterior pituitary.

Prolactin-releasing hormone

This peptide is produced in the corpus luteum, uterus, placenta, and mammary gland and is involved in the relaxation of muscle and ligament tissues in preparation for menstruation.

Relaxin