Chemical properties of bovine cervical mucus during normal estrus and estrus induced by progesterone and/or PGF2α
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- 作者：Tsiligianni ; Th. ; Karagiannidis ; A. ; Brikas ; P. ; Saratsis ; Ph.
- 关键词：cervical mucus ; biochemical properties ; cow ; estrus ; normal ; induced
- 刊名：Theriogenology
- 出版年：2001
- 出版时间：July 1, 2001
- 年：2001
- 卷：56
- 期：1
- 页码：41-50
- 全文大小：644 K
文摘
Ninety-two Friesian cows were used to determine the chemical properties of cervical mucus during normal estrus and estrus induced by progesterone (P4)-releasing intravaginal devices (PRID) and/or prostaglandin F2α. The animals were assigned to 4 groups (no treatment, a PRID for 12 days plus injection of 1000 IU PMSG at the removal of PRID, a double im injection of PGF2α 11 days apart, or PRID for 7 days plus an im injection of PGF2α 24 h before the removal of PRID). A number of cows with normal estrus exhibit three consecutive estrous cycles after delivery. Cows that had not shown estrus for 3 months after delivery had their ovaries palpated twice at 10-day intervals, to determine their ovarian activity. Then PRID and/or PGF2α was administered in cows that had a palpable corpus luteum in one of the two palpations (cyclic cows). A double artificial insemination (AI) was performed to the cows of the three induced-estrus groups, while the cows with normal estrus received only one AI. Cervical mucus samples were collected from all cows 5 to 30 min before the first AI. Additionally, samples of cervical mucus were collected from 20 cows during their first estrus after the induced one.