Prolonged service intervals in cattle
作者:
K. Moller,
K.R. Lapwood,
R.M. Marchant,
期刊:
New Zealand Veterinary Journal
(Taylor Available online 1986)
卷期:
Volume 34,
issue 8
页码: 128-132
ISSN:0048-0169
年代: 1986
DOI:10.1080/00480169.1986.35322
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A trial based on progesterone radioimmunoassay of milk samples is described. Samples from 2274 cows in 14 herds were collected on the day of insemination and 7, 23 and 30 days later, unless a return to service occurred before the designated sample date. Two additional samples were collected from cows which returned to service more than 35 days after the first service, one on the day of the return and another seven days later. All six samples from these cows were assayed for progesterone concentration.
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