Progesterone

Definition of Progesterone

From the elephant glossary Section: hormone

Progestrone level correlation of female Asian elephants, Circus Krone, Germany, Koehl, D (2000)

Elephants mentoned above: from left; Burma, Bara, Delhi, Mala. Circus Krone 2000. Photo: Jutta Kirchner, Vienna Zoo.

Relevant Literature about Progesterone
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Progesterone is a hormone, which drops down to almost zero during estrus. In some Groups , the oldest or most dominant female seem to synchronize the Progesterone cycle of other females in the heard, se image to the right (Circus Krone, Germany).

From Biology, Medicine, and Surgery of Elephants, 2006 by Murray Fowler, Susan K. Mikota

Diagnosis of Pregnancy in elephants may be performed endocrinologically using Prolactin or progesterone levels.

Use of two or three serum progesterone samples for Pregnancy determination may be complicated by a transient fall in progesterone levels at 8–10 weeks postconception to near baseline levels before rising above normal cycling luteal levels. In the first half of Pregnancy, progesterone is usually above normal luteal levels and falls slowly to near the levels found in the luteal phase of nonpregnant cows near parturition.

Regular monitoring of serum chemistries and a CBC is recommended throughout Pregnancy in addition to weekly progesterone monitoring. As the cow nears parturition, progesterone monitoring is increased to provide warning of impending birth so that adequate preparations can be made and assistance provided if necessary.

Biology, Medicine, and Surgery of Elephants, 2006 by Murray Fowler, Susan K. Mikota

Reference list Koehl, Dan, (2024). Progesterone. Elephant Encyclopedia, available online retrieved 20 September 2021 at https://www.elephant.se/index.php?id=154. (archived at the Wayback machine)

Sources used for this article is among others:

*FOWLER

Selected publications

Doi, O., Komatsumoto, M., Terazono, M. and Wada, S. 2000. Exfoliative cytology in vaginal vestibule of female Asian elephants: Relation to circulating progesterone concentrations. Zool Sci 17:1303–1309.
Wasser, S.K., Papageorge, S., Foley, C. and Brown, J.L. 1996. Excretory fate of estradiol and progesterone in the African elephant (Loxodonta africana) and patterns of fecal steroid concentrations. Gen Comp Endocrinol 102:255–262
Carden, M., Schmitt, D., Tomasi, T., Bradford, J., Moll, D. and Brown, J. 1998. Utility of serum progesterone and prolactin analysis for assessing reproductive status in the Asian elephant (Elephas maximus). Anim Reprod Sci 53:133–142.
Brown, J.L., Citino, S.B., Bush, M., Lehnhardt, J. and Phillips, L.G. 1991. Cyclic patterns of luteinizing hormone, folliclestimulating hormone, inhibin, and progesterone in the Asian elephant (Elephas maximus) J Zoo Wildl Med 22:49–57.

Links about Progesterone

Selected external links for this article about Progesterone:

https://bearworks.missouristate.edu/theses/200/

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Categories glossary | hormone

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