| oocyte donation | <gynaecology> Transfer of egg cell from donor to host mother. Oocytes are captured by laparoscopy, fertilised in vitro, and transferred to the recipient. Used for women with premature ovarian failure or severe genetic disorders, women who respond poorly to human menopausal gonadotropin, and women older than 40 years who do not conceive with use of other therapies. (21 Jun 2000) |
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| egg donation | Donation of an ovum by one woman to another who attempts to become pregnant by in vitro fertilization. (09 Oct 1997) |
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| primary oocyte | <cell biology, gynaecology> The enlarging ovum before maturity is reached, as opposed to the secondary oocyte or polar body. (18 Nov 1997) |
| secondary oocyte | <gynaecology> An oocyte which arises from the primary oocyte (which was diploid) after it completes the first meiotic division after the body has become sexually mature. The secondary oocyte eventually divides into the mature egg or ovum (which is haploid) and a polar body (which degenerates), thus ending the second meiotic division. (13 Nov 1997) |
| oocyte | The developing female gamete before completion and release. The female germ cells in stages between the prophase of the first maturation division and the completion of the second maturation division. (21 Jun 2000) |
| oocyte expression | <molecular biology> Technique whereby the cellular machinery of an oocyte (typically that of Xenopus) is utilised to transcribe functional protein from microinjected RNA. (18 Nov 1997) |