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Changes of progesterone levels in the milk of dairy cows in post-partum

Journal Article:

Abstract

Progesterone levels were measured by radioimmunoassay in the last milk of seven dairy cows in 5-75 days post-partum. The progesterone levels were from 0.1 to 1.5 ng/ml and averaged 0.4 +- 0.2 ng/ml for the last milk of the seven cows. A range of 0.3 to 0.7 ng/ml for average progesterone levels of the seven cows can be estimated. Two ovarian cycle activities in post-partum of cow No. 43 were observed and a ovulation on 15-20 days post-partum was revealed. The peak value after 20 days post-partum was 3.0 ng/ml. The progesterone level after peak value was declined, and reached to about 0.2 ng/ml on 35 days post-partum. The changes of ovarian activities were exhibited again in 35-55 days post-partum. The progesterone levels of cow No. 43 were lower in luteal phase oestrous cycles post-partum than that from the other cows in normal luteal phase oestrous cycles.
Authors:
Publication Date:
Jun 01, 1985
Product Type:
Journal Article
Reference Number:
AIX-18-040892; EDB-87-112513
Resource Relation:
Journal Name: Appl. At. Energy Agric.; (China); Journal Volume: 2
Subject:
60 APPLIED LIFE SCIENCES; PROGESTERONE; RADIOIMMUNOASSAY; CATTLE; ESTROUS CYCLE; MILK; OVULATION; ANIMALS; BIOLOGICAL MATERIALS; BODY FLUIDS; DOMESTIC ANIMALS; FOOD; HORMONES; IMMUNOASSAY; IMMUNOLOGY; ISOTOPE APPLICATIONS; KETONES; MAMMALS; MATERIALS; ORGANIC COMPOUNDS; PREGNANES; RADIOASSAY; RADIOIMMUNOLOGY; RUMINANTS; STEROID HORMONES; STEROIDS; TRACER TECHNIQUES; VERTEBRATES; 553005* - Agriculture & Food Technology- Animal Husbandry- (1987-)
OSTI ID:
6405735
Research Organizations:
Northwest College of Agriculture, Wugong, SN, China
Country of Origin:
China
Language:
Chinese
Other Identifying Numbers:
Journal ID: CODEN: YTNYD
Submitting Site:
INIS
Size:
Pages: 10-13
Announcement Date:

Journal Article:

Citation Formats

Yongpeng, Li. Changes of progesterone levels in the milk of dairy cows in post-partum. China: N. p., 1985. Web.
Yongpeng, Li. Changes of progesterone levels in the milk of dairy cows in post-partum. China.
Yongpeng, Li. 1985. "Changes of progesterone levels in the milk of dairy cows in post-partum." China.
@misc{etde_6405735,
title = {Changes of progesterone levels in the milk of dairy cows in post-partum}
author = {Yongpeng, Li}
abstractNote = {Progesterone levels were measured by radioimmunoassay in the last milk of seven dairy cows in 5-75 days post-partum. The progesterone levels were from 0.1 to 1.5 ng/ml and averaged 0.4 +- 0.2 ng/ml for the last milk of the seven cows. A range of 0.3 to 0.7 ng/ml for average progesterone levels of the seven cows can be estimated. Two ovarian cycle activities in post-partum of cow No. 43 were observed and a ovulation on 15-20 days post-partum was revealed. The peak value after 20 days post-partum was 3.0 ng/ml. The progesterone level after peak value was declined, and reached to about 0.2 ng/ml on 35 days post-partum. The changes of ovarian activities were exhibited again in 35-55 days post-partum. The progesterone levels of cow No. 43 were lower in luteal phase oestrous cycles post-partum than that from the other cows in normal luteal phase oestrous cycles.}
journal = {Appl. At. Energy Agric.; (China)}
volume = {2}
journal type = {AC}
place = {China}
year = {1985}
month = {Jun}
}