Prolactin Is a Peptide Hormone Produced by the Pituitary Gland

Short Answer

Prolactin is a peptide hormone produced by the pituitary gland that stimulates breast and milk development in pregnant women.The normal prolactin concentration in a pregnant woman's blood is 10‒209 ng/mL.Because prolactin's molecular weight is 22,000 g/mole, a concentration of 110 ng/mL is equivalent to a concentration of 5 nM (nanomolar).Compared with the concentration of most molecules in the blood, the concentration of prolactin is significantly _______.