The hormone produced in early pregnancy, released by the placenta after implantation, which keeps the corpus luteum producing estradiol and progesterone and thus prevents menstruation. Also used via injection to trigger ovulation after some fertility treatments, and used in men to stimulate testosterone production.
Blocked, dilated, fluid-filled fallopian tube.
Inadequate ovarian or testicular function as shown by low sperm production or lack of follicle production, as well as low or absent levels of luteinizing hormone (LH) and follicle stimulating hormone (FSH).
Hypogonadotropic hypogonadism (HH) is a rare condition in which impaired activity of the hypothalamus or pituitary results in below-normal function of the gonads and in abnormally low luteinizing hormone (LH) and follicle stimulating hormone (FSH) serum levels and consequential negligible estrogen levels. (The gonads are the ovaries and testes. The hormones they normally produce include estrogen, progesterone, and testosterone.)
The gland at the base of the brain that controls the release of hormones from the pituitary glands.