A - B - C - D - E - F - G - H - I - K - L - M - N - O - P - Q - R - S - T - U - V - X - Y - Z hCG/HCG - See Human Chorionic Gonadotropin. See beta chart Hemorrhage - Profuse, life-threatening bleeding. hMG, HMG - See Human Menopausal Gonadotropin. Home Pregnancy Test - A test a woman can use at home to test urine for the presence of hCG. Hormone - A substance produced by an endocrine gland that trabelss through the bloodstream to a specific organ. Hormone Replacement Therapy (HRT) - Refers to estrogen and progesterone replacement in menopausal women. Hostile Mucus - Cervical mucus that impedes the natural progress of sperm through the cervical canal. HRT - See Hormone Replacement Therapy. HSC - See Hysteroscopy. HSG - See Hysterosalpingogram. Human Chorionic Gonadotropin - The hormone produced in early pregnancy which keeps the corpus luteum producing progesterone. Also used via injection (Profasi) to trigger ovulation after some fertility treatments, and used in men to stimulate testosterone production. Human Menopausal Gonadotropins - A combination of hormones FSH and LH, which is extracted from the urine of post-menopausal women. Used to induce ovulation in several fertility treatments. Humegon - See Human Menopausal Gonadotropins Hydatidiform Mole - See Molar Pregnancy. Hyperplasia - A thickening of the endometrium. It can lead to abnormal, pre-cancerous cells. Hyperprolactinemia - A condition in which the pituitary gland secretes too much prolactin. Prolactin can suppress LH and FSH production, reduce male sex drive, and directly suppress ovarian function. Hyperstimulation - A potentially life-threatening side effect of ovulation induction with injectable fertility medications such as hMG and urofollitropins. A woman's ovaries become enlarged and produce an overabundance of eggs. Blood hormone levels rise, fluid may collect in the lungs or abdominal cavity, and ovarian cyst may rupture, causing internal bleeding. Bloodclots sometimes develop. Symptoms include sudden weight gain and abdominal pain. Cycles stimulated with these drugs must be carefully monitored with ultrasound scans. OHSS may be prevented by withholding the hCG injection when ultrasound monitoring indicates that too many follicles have matured. Hypoestrogenic - Having lower than normal levels of estrogen. Hypogonadotropic Hypopituitarism - A spectrum of diseases resulting in low pituitary gland output of LH and FSH. Men with this disorder have low sperm counts and may lose their virility; women do not ovulate and may lose their secondary sex characteristics. Hypoplastic Uterus - An underdeveloped uterus. Hypospermatogenesis - Low sperm production. Hypothalamus - A part of the brain, the hormonal regulation center, located adjacent to and above the pituitary gland. In both the man and the woman this tissue secretes GnRH every ninety minutes or so. The pulsatile GnRH enables the pituitary gland to secrete LH and FSH, which stimulate the gonads. See also FSH; LH; Ovary; Pituitary Gland; Testicle. Hysterosalpinogram - An x-ray of the pelvic organs in which a radio-opaque dye is injected through the cervix into the uterus and fallopian tubes. This test checks for malformations of the uterus and blockage of the faloipian tubes. Hysterectomy - Surgical removal of the uterus and sometimes also the cervix. Hysteroscopy - A procedure in which the doctor checks for uterine abnormalities by inserting a fiber-optic device. Minor surgical repairs can be executed during the procedure. Back to top