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- Glossary
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Glossary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Gamete
The reproductive cells. In men the gamete is the sperm cell; in women the gamete is the egg (ovum).
Gestational Sac
A fluid-filled structure surrounding an embryo that develops within the endometrial cavity early in pregnancy.
Gestational Surrogate
A woman who gestates (carries a pregnancy) a non-genetically-related embryo and fetus for a recipient couple, who are the genetic parents of the child. The gestational carrier gives birth to the child, and then releases the child to its genetic parents. Gestational surrogacy should be differentiated from conventional (or traditional) surrogacy in that the conventional surrogate pregnancy is the product of the gestational mother's oocyte and the infertile couple's husband's sperm. Thus, the surrogate is expected to relinquish a child who is genetically partly hers. In gestational surrogacy, the embryo is the genetic product of both the egg and sperm of the infertile couple. This embryo is transferred to the uterus of the gestational carrier who has no genetic relationship to the offspring.
GnRH Analogs
Synthetic hormones similar to the naturally occurring gonadotropin releasing hormone (GnRH).
Gonad
The ovary in the woman; the testicle in the man.
Gonadotropin Releasing Hormone Agonist
GnRH analogue hormones used for many purposes in reproductive endocrinology and gynecology. Leuprolide acetate (Lupron) is the most commonly prescribed hormone of this class in the United States.
Gonadotropin Releasing Hormone
A protein hormone secreted by the hypothalamus that if released in a pulsatile fashion prompts the pituitary gland to release follicle stimulating hormone (FSH) and luteinizing hormone (LH) into the bloodstream.
Gonadotropins
Protein hormones that are produced by the pituitary gland and which stimulate the gonads. Most commonly this refers to follicle stimulating hormone and luteinizing hormone.
Grandmultiple pregnancy
A pregnancy of greater number than twins (triplets, quadruplets, quintuplets, etc.)