Length of the estrous cycle in sheep is on average 17 days but can vary between 14 and 19 days. Average duration of estrus is 24 to 36 hours, with ovulation occurring toward the end of estrus or approximately 24 hours after the onset of estrus. In goats, the length of the estrous cycl...
The length of the normal estrous cycle is 17 days for sheep and 21 days for goats, although there is considerable variation due to breed differences, stage of the breeding season, and environmental stress in both farm animal species. Breed, age, season, and presence of the male influence ...
The minimal dose of progesterone that shortened (P<0.05) the estrous cycle was 6 mg and was the same dose that began to stimulate (P<0.05) blastocyst growth. Lambing rates of Targhee ewes were not different following treatment with exogenous progesterone. However, the lambing rate of Polypay...
Over successive estrous cycles, length of estrous cycles increased significantly.doi:10.4141/cjas74-053DUFOURJ. J.Canadian Journal of Animal ScienceDufour, J.J., 1974. The duration of the breeding season of four breeds of sheep. Can. J. Anim. Sci. 54:389-392....
Estrous cycle-dependent differences in responsiveness to prostaglandins and contractile agents in sheep (Ovis aries) cervical smooth muscle. J Vet Pharmacol Ther 2007;30:534-40.Pereira AF, Melo LM, Avelar SRG, Moura RM, Leal-Cardoso JH, Freitas VJF 2007. Estrous cycle-dependent differences in ...
Importance of estradiol and progesterone in regulating LH secretion and estrous behavior during the sheep estrous cycle. Biol Reprod. 1980;23:404–13. 2. Delgadillo JA, Gelez H, Ungerfeld R, Hawken PAR, Martin GB. The 'male effect' in sheep and goats—revisiting the dogmas. Behav Brain ...
Pulsatile secretion of LH and ovarian estradiol during the follicular phase of the sheep estrous cycle. 来自 Semantic Scholar 喜欢 0 阅读量: 72 作者: DT Baird 摘要: The concentration of LH in jugular venous plasma and the ovarian secretion of estradiol was measured every 10 min for periods of...
As with other milk, variations in composition with breed, stage of lactation, diet, season, milking times, and procedure have been recorded. The fat and total solids content tends to increase with the length of lactation leading to about 10% (w/v) fat content at the end of lactation. The...
[43,44]. Multiple studies have been conducted by researchers used RNA sequencing to analyze the gene expression patterns in the ovaries of Small Tail Han sheep during the follicular and luteal phases of the estrous cycle [45,46,47]. These studies have identified several differentially expressed ...
Table 1 Mean (± SD) of the corpus luteum diameter, uterine cross-section, embryo and amniotic sac length at the beginning of pregnancy in sheep (n = 16) Full size table Fig. 3 Ultrasound image of the placenta of a sheep in B-Mode on day 21 of pregnancy. Arrows - placenta, ar...