title: [Study of the influence of some factors on conception and fertility rates in sheep in the anestrus period].
abstract: Experiments were carried out with a total of 520 sheep, two-breed crosses, during the anestrus period (January-May) in 1972 and 1973. Estrus was induced by means of hormonal preparations, such as implants (Silestrus), vaginal swabs (Veramix), pregnant mare sera (Rigaoux) as well as estradiol-valerianat. Both the test and the control groups of animals were divided into four lots to study: a. the effect of the interval following lambing and the season on the results of hormonal treatment; b. the conception and fertility rates in lactating ewes with weaned lambs in the anestrus period; c. the effect of hormonal treatment in young and adult ewes nursing single lambs or twins and d. the influence of the functional status on the results of hormonal treatment.
mesh_terms: D000367:Age Factors; D000818:Animals; D004341:Drug Evaluation; D004958:Estradiol; D004971:Estrus; D005260:Female; D005298:Fertility; D005300:Fertility Agents, Female / Q000494:pharmacology; D007774:Lactation; D011247:Pregnancy; D012621:Seasons; D012756:Sheep; D013997:Time Factors
chemical_list: D005300:Fertility Agents, Female; D004958:Estradiol
vernacular_title: Prouchvane vliianieto na niakoi faktori v'rkhu zaplodiaemostta i plodovitostta na ovtse v izv'nrazmnozhitelen period