NDLI: Melengestrol acetate implant contraception in addax (Addax Nasomaculatus) and Arabian oryx (Oryx Leucoryx).

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Zoo biology special issue on contraception.

Immunocontraception and increased longevity in equids.

Effect of progestins on serum hormones, semen production, and agonistic behavior in the gerenuk (Litocranius walleri walleri).

Suppression of ovulation in Nile Hippopotamus (Hippopotamus amphibious) using melengestrol acetate-treated feed or high dose Depo-Provera injection.

Restoration of reproductive potential after expiration or removal of melengestrol acetate contraceptive implants in Tigers (Panthera tigris).

Reproductive cycles and contraception of black lemurs (Eulemur macaco macaco) with depot medroxyprogesterone acetate during the breeding season.

Melengestrol acetate implant contraception in addax (Addax Nasomaculatus) and Arabian oryx (Oryx Leucoryx).

Review of contraception in ungulate species.

Year: 2007 Volume: 26 Issue: 3

Year: 2007 Volume: 26 Issue: 2

Year: 2007 Volume: 26 Issue: 1

Melengestrol acetate implant contraception in addax (Addax Nasomaculatus) and Arabian oryx (Oryx Leucoryx).

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Hall-Woods, Monica L. Bauman, Karen L. Bauman, Joan E. Fischer, Martha Houston, E. William Asa, Cheryl S.
Description	Author Affiliation: Hall-Woods ML ( AZA Wildlife Contraception Center, Saint Louis Zoo, St. Louis, Missouri.)
Abstract	Melengestrol acetate (MGA) implants were used for contraception in three addax and three Arabian oryx females housed at the Saint Louis Zoo. Serum estradiol and progesterone or fecal estrogen and progestin analysis and ultrasonography of reproductive tracts were used for monitoring changes before, during, and after MGA treatment. Follicular development and irregular uterine fluid accumulation were detected in all females during MGA treatment. Although housed with an intact male for all or most of the contraceptive period, no pregnancies occurred.One female addax may have ovulated, based on sustained elevated progesterone levels, and another showed continued follicle development, as seen by fluctuating estradiol concentrations. Reversibility was documented in two of the three addax that resumed reproductive cycles post-MGA-implant removal, whereas the third, a peripubertal female, did not cycle before, during, or after treatment. Addax females were lost to further follow-up after transfer to another institution, so the possibility of subsequent pregnancies is not known.All three Arabian oryx ovulated during the initial MGA treatment, but two of the three females had implants past the typical 2-year efficacy period. They had regular ovulatory cycles after implant removal, with mean cycle length of 27.5+/-1.5 days and mean luteal phase duration of 15.2+/-0.7 days. Reversibility was further shown in all three oryx by pregnancies after placement with a male approximately 2 years after MGA implant removal. Two produced healthy calves, but the third died owing to an unrelated terminal illness in the mother. Zoo Biol 26:299-310, 2007. (c) 2007 Wiley-Liss, Inc.
File Format	HTM / HTML
ISSN	07333188
Issue Number	4
Journal	Zoo Biology
Volume Number	26
e-ISSN	10982361
Language	English
Publisher	Wiley
Publisher Date	2007-07-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Zoology
Content Type	Text
Resource Type	Article
Subject	Medicine Animal Science and Zoology

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