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Galactorrhea - A clear or milky discharge from the breasts associated with elevated prolactin.

Gamete - A reproductive cell: Sperm in men, the egg in women.

Gamete Intrafallopian Transfer - A technique that may be used in lieu of in vitro fertilization for women with patent (clear and open) tubes. After egg retrieval the eggs are mixed with sperm and then immediately injected through the fimbria into the woman's fallopian tubes for in vivo fertilization. Procedure is done through laparoscopy.

Genetic Counseling - The advice offered by experts in genetics on the detection, consequences, and risk of recurrence of chromosomal and genetic disorders.

Germ Cell - In the male the testicular cell that divides to produce the immature sperm cells; in the woman the ovarian cell that divides to form the egg (ovum). The male germ cell remains intact throughout the man's reproductive life; the woman uses up her germ cells at the rate of about one thousand per menstrual cycle, although usually only one egg matures each cycle.

Gestation - The period of fetal development in the womb (uterus) from implantation to birth.

Gestational Host - A woman who contracts to carry a pregnancy for someone else. The host is not the biological mother of the baby being carried. See Surrogacy

Gestation Sac - The fluid-filled sac in which the fetus grows and develops.

GIFT - See Gamete Intrafallopian Transfer

Gland - An secretory organ or structure that produces or secretes essential body fluids or substances, such as hormones.

GnRH - See Gonadotropin Releasing Hormone.

Gonads - The glands that make reproductive cells and "sex" hormones: the testicles, which make sperm and testosterone, and the ovaries, which make eggs (ova) and estrogen.

Gonorrhea - A sexually transmitted disease that may lead to infertility. Caused by the bacteria Neisseria gonococcus.

Gonadotropins - Hormones that control reproductive function: Follicle Stimulating Hormone and Leutenizing Hormone.

Gonadotropin Releasing Hormone - The hormone which controls the production and release of gonadotropins. Secreted by the hypothalamus every ninety minutes or so, this hormone enables the pituitary to secrete LH and FSH, which stimulate the gonads.

Gonal-F - Recombinant FSH injectable fertility medication used for superovulation.

Granuloma - A ball of inflamed tissue, commonly formed after vasectomy due to sperm leaking into the vas deferens.

Gynecologist - A doctor who specializes in the diseases and the routine physical care of the reproductive system of women.

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