H

Human Chorionic Gonadotrophin (HCG): A protein hormone usually secreted by the chorionic villi of the placenta. Its presence in the maternal blood or urine indicates pregnancy.

HEPT (Hamster Test): Mixing of sperm with the egg of a hamster for the purpose of testing fertility.  Any test material must be destroyed no later than the 2 cell stage.

HFE Act: The Human Fertilisation and Embryology Act 1990.

HFEA: Human Fertilisation and Embryology Authority.

HOS Test:  Hypo-osmotic swelling test, used to test the integrity and behaviour of the cell membrane of the sperm tail.

Human Menopausal Gonadotrophin:  A drug used to stimulate egg (oocyte) development in the ovary as part of superovulation.

Hyperstimulation: An excessive response of the ovaries to ovarian stimulation.

Hysterectomy:  The surgical removal of the uterus (womb).

Hysterosalpingogram: An x-ray of the fallopian tubes which involves the passage of dye through the tubes to see if they are obstructed.