ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Studies on serum progesterone levels in Zebu × Holstein heifers during pre- and peripubertal periods

Balakrishnan, M and Chinnaiya, GP and Nair, PG and Rao, Jagannadha A (1986) Studies on serum progesterone levels in Zebu × Holstein heifers during pre- and peripubertal periods. In: Animal Reproduction Science, 11 (1). pp. 11-15.

[img] PDF
studies.pdf - Published Version
Restricted to Registered users only

Download (250Kb) | Request a copy
Official URL: http://www.sciencedirect.com/science?_ob=ArticleUR...

Abstract

The peripheral serum progesterone levels of six normal Zebu × Holstein heifers (75% Holstein inheritance) during the prepubertal period (−150 days) were low (0.23 ± 0.06 ng/ml). They reached maximal values (0.73 ± 0.06 ng/ml) by −45 days (P<0.05 for progesterone values on −90th vs. −45th days) and thereafter decreased to the base level at the time of puberty. The mean (± SEM) age and body weight at puberty of these six heifers were 720 ± 20.70 days and 260.67 ± 8.82 kg, respectively. The serum progesterone levels remained low (0.38 ± 0.17 ng/ml) during early oestrus (up to 28 h) and gradually increased to 2.3 ± 0.84 ng/ml by the 15th day of the cycle.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Department/Centre: Division of Biological Sciences > Biochemistry
Date Deposited: 02 Feb 2010 06:58
Last Modified: 06 Dec 2010 08:20
URI: http://eprints.iisc.ernet.in/id/eprint/21789

Actions (login required)

View Item View Item