This review is primarily concerned with ovarian activity, as determined by transrectal ultrasonography, and measurements of circulating concentrations of gonadotrophins and ovarian steroids during reproductive cycles in sheep. The growth of antral follicles reaching ostensibly ovulatory sizes occurs in a wave...
1.the act or process of reproducing.He is studying reproduction in rabbits.reproducción 2.a copy (of a work of artetc).These paintings are all reproductions.reproducción ˌreproˈductive(-ˈdaktiv)adjective of or for reproduction.the reproductive organs of a rabbit.reproductor ...
Plant breeding operates through iterative cycles of recombination and selection in order to produce elite varieties optimally adapted to local growing cond... Lelivelt,C Clc 被引量: 0发表: 0年 Repeatability and heritability of components of reproductive efficiency in fine-wool sheep. Data relating ...
After initial denaturation at 95 °C for 5 min, 20 cycles of denaturation at 95 °C for 30 s, annealing at 50 °C for 30 s, and extension at 72 °C for 40 s, and a final step at 72 °C for 7 min. The amplified products were purified with an Omega DNA purification kit (...
Prenatal programming of reproductive neuroendocrine function: fetal androgen exposure produces progressive disruption of reproductive cycles in sheep. In the agonadal, androgenized ewe testosterone before birth produces a precocious pubertal rise in circulating LH and abolishes the LH surge mechanism. The.....
9 RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook nonreproductive (ˌnɒnˌriːprəˈdʌktɪv) adj (Biology) not reproductive, not involving reproduction Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publ...
Pregnancy recognition, establishment and maintenance in sheep (Ovis aries) Luteolytic mechanism Domestic animals are spontaneous ovulators that undergo uterine-dependent estrous cycles until establish- ment of pregnancy [4-6]. The estrous cycle is dependent on the uterus, because it is the source ...
Recent detailed data on 22 bucks and 72 antler cycles have been obtained in Uruguay at the ECFA [81]. The mean date of the first casting of antlers was 4 August (i.e. mid-winter). The brow and the trez tine were first observed 22.8 ± 0.6 and 45.9 ± 0.9 days after the first an...
It is concluded that short light cycles are able to induce persistent reproductive activity in Ile-de-France rams, which may have practical applications in sheep production systems. 展开 DOI: 10.1530/biosciprocs.9.016 被引量: 107 年份: 1987 ...
In different sheep breeds, polymorphisms at the melatonin receptor 1A (MTNR1A) gene are associated with an early reproductive recovery in spring, which is advantageous to shorten the anestrus period. Nevertheless, there are still shortcomings in the relationship between these polymorphisms and the ...