PATTERNS OF FOLLICULAR DEVELOPMENT DURING PERIODS OF ANOVULATION IN PASTURE-FED DAIRY-COWS AFTER CALVING

被引：71

作者：

MCDOUGALL, S ^{[1
]}

BURKE, CR ^{[1
]}

MACMILLAN, KL ^{[1
]}

WILLIAMSON, NB ^{[1
]}

机构：

[1] MASSEY UNIV,DEPT VET CLIN SCI,PALMERSTON NORTH,NEW ZEALAND

来源：

RESEARCH IN VETERINARY SCIENCE | 1995年 / 58卷 / 03期

关键词：

D O I：

10.1016/0034-5288(95)90104-3

中图分类号：

S85 [动物医学（兽医学）];

学科分类号：

0906 ;

摘要：

The ovaries of 17 Friesian cows aged two to seven years were examined daily by transrectal ultrasound from one week after calving. The position and size of all follicles more than 2 mm in diameter were recorded. A large (more than 9 mm in diameter) follicle was present on at least one ovary by six to 17 days after calving, and in two of the cows it ovulated; the remaining cows had from two to nine large follicles before they ovulated. The mean (SEM) interval from calving to the first ovulation was 43.4 (5.3) (range 13 to 93) days, after 4.2 (0.6) waves of follicles.

引用

页码：212 / 216

页数：5

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