Hypogonadotropic Hypogonadism
The inability of the gonads to function normally because of subnormal levels of the gonadotropins LH and FSH.
Hyponatremia
Serum sodium concentration and serum osmolarity normally are maintained under control involving stimulation of thirst, secretion of antidiuretic hormone (ADH), and renal andling of filtered sodium.
Hypophysis
Pituitary gland.
Hypothalamic-Pituitary-Gonadal Axis
The system designed to produce sex steroids in proper amounts.
Hypothalamus
A thumbnail-sized part of the brain located just above the pituitary gland to which it is connected.
Hypotonicity
Diminished muscle tone; limp muscles.
Hysterosalpingography
Radiography of the uterus and fallopian tubes after the injection of radiopaque material.
Hysterosonography
Sonography of the uterus and fallopian tubes using a transvaginal probe following the injection of sterile saline into the uterus.
