gonadotropin: hormone secreted by the anterior pituitary gland and placenta; stimulates the gonads and controls reproductive activity
hormone: the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect
lumen: a unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions