By Richard E. Jones
This acclaimed textual content has been totally revised and up to date, now incorporating matters together with getting older of the reproductive method, and updates at the chapters on belief and Gamete shipping and Fertilization, and being pregnant. Human Reproductive Biology, third version emphasizes the organic and biomedical facets of human replica, explains advances in reproductive technological know-how and discusses the alternatives and issues of at the present time. Generously illustrated in complete colour, the textual content offers present information regarding human reproductive anatomy and body structure. the fitting booklet for classes on human reproductive biology - contains bankruptcy introductions, sidebars on similar issues of curiosity, bankruptcy summaries and recommendations for extra analyzing. * All fabric competely up to date with the most recent learn effects, tools, and themes now equipped to facilitate logical presentation of subject matters * New chapters on Reproductive Senescence, perception: Gamete shipping, Fertilization, being pregnant: Maternal facets and being pregnant: Fetal improvement * complete colour illustrations, New better half web site that includes most up-to-date info on present comparable subject matters
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Additional info for Human Reproductive Biology, Third Edition
Estrogen can also have a positive feedback effect on LH secretion in women. The feedback effects can operate on the surge center, HTA, or adenohypophysis. Prolactin secretion from the pars distalis is controlled by both a prolactin-releasing hormone and a prolactin release-inhibiting hormone from the hypothalamus. Estrogens increase the sensitivity of prolactin-secreting cells in the adenohypophysis to PRH. , and Hodgen, G. D. (1992). Evolving role of gonadotropin-releasing hormone antagonists.
Despite their utility, these GnRH agonists often have side effects, including menopausal-like symptoms (hot flashes, insomnia, vaginal dryness), osteoporosis, and headaches, and they can increase the risk of ovarian cysts. The dramatic effects of these molecules in both promoting and suppressing fertility illustrate the central, essential role of GnRH in reproduction. Continued on next page. Ch01-P088465 3/8/06 10:49 AM Page 21 21 The GnRH Pulse Generator and Surge Center Chapter 1, Box 1 continued.
The GnRH inhibitory agonists and GnRH antagonists are medically useful for their ability to shut down gonadotropins and, consequently, lower gonadal steroids and inhibit egg and sperm maturation. Typically, these drugs are given as daily or monthly injections, an implant, or a nasal spray. They are employed to treat endometriosis and uterine fibroids by reducing circulating estrogen levels, causing the affected tissues to shrink. They are also being studied as potential contraceptives. In fertility clinics, inhibitory GnRH analogs are used to prevent premature ovulation so its timing can be controlled by the use of fertility drugs in in vitro fertilization/gamete intrafallopian transfer procedures (see Chapter 16).
Human Reproductive Biology, Third Edition by Richard E. Jones