Gamete - in infertility treatments, the gamete refers to either the egg or sperm cell.
Gamete Intrafallopian Transfer - (GIFT) Although hardly ever done anymore, GIFT is an assisted reproductive treatment where the gametes (egg and sperm cells) are not fertilized outside the body, as they are during typical IVF. Instead, they are placed together in one of the fallopian tubes. Sometimes, GIFT is requested instead of IVF due to religious reasons.
GnRH Agonists - a fertility drug, GnRH agonists are artificial hormones that mimic the body’s natural hormone gonadotropin-releasing hormone (GnRH). A GnRH agonist first leads to a rapid increase in the hormone production. However, after this brief increase, the pituitary gland stops producing the hormones, preventing ovulation.
GnRH Antagonists - a fertility drug, GnRH antagonists suppress the hormone production. While GnRH agonists lead to an initial surge of the hormones FSH and LH, GnRH antagonists do not create this surge. Used along with gonadotropins, GnRH antagonists may be a part of IVF treatment. They are used to prevent natural ovulation. Instead, the fertility doctor will artificially stimulate ovulation with other fertility drugs, in a controlled manner known as superovulation.
GnRh-GnRH - short for gonadotropin-releasing hormone, is released by the part of the brain known as the hypothalamus. At the beginning of the menstrual cycle, the hypothalamus releases GnRH. The GnRH then stimulates a different part of the brain, the pituitary gland, to produce two hormones, known as follicle-stimulating hormone (FSH) and luteinizing hormone (LH). FSH is the hormone that triggers the development of immature eggs in the ovaries, while LH eventually triggers the release of the egg.