Effect of an oral progestin on the estrous cycle and fertility of mares.
نویسندگان
چکیده
On February 4, 14 of 28 seasonally anestrous mares were fed .044 mg per kilogram of body weight of an oral progestin, allyl trenbolone (17a-allyl-estratriene 4-9-11, 17/3-ol-3-one) for 12 days. There was no difference (P>.05) between groups for the number of mares exhibiting estrus after treatment or follicular activity during or after treatment. After March 6, 18 mares that had not yet ovulated were used in a second trial. On day 3 of estrus, nine of 18 mares were a~signed to be fed allyl trenbolone for 12 days. Estrus ceased in all mares within 3 days of treatment. Duration of post-treatment estrus, interval from end of treatment to ovulation and from estrus to ovulation were shorter (P<.01) for treated mares. Influence of stage of cycle at the onset of treatment was evaluated in a third trial. Mares (N = 25) were assigned to one of five groups: 1) controls artificially inseminated every other day (E/O) during estrus; 2) fed allyl trenbolone for 12 days beginning day 3 of estrus and bred E/O; and groups 3 to 5) fed allyl trenbolone for 12 days beginning day 3 of estrus or days 5 or 10 of diestrus. Mares in groups 3, 4 and 5 were given HCG (3,300 IU) on day 17 and inseminated on days 17 and 19. The interval from treatment to estrus was shorter (P<.05) for mares treated during diestrus vs those treated during estrus. Pregnancy rates were not different (P>.IO) among groups
منابع مشابه
اثر عصاره هیدروالکلی میوه پنج انگشت بر باروری و سیکل جنسی در موش صحرایی پس از القای سندرم تخمدان پلی کیستیک با لتروزول
Background: Polycystic ovary syndrome (PCOS) is one of the most important endocrine disorders and a common cause of anovulation and infertility in women in the reproductive age. Vite xagnus castus is used as an alternative medicine for treatment of endocrine disorders in women. This study was conducted to evaluate the effects of hydroalcoholic extract of Vitex agnus castus on fertility and estr...
متن کاملP-92: Assessment of Stem Cells in Adult Mouse Ovaries during Estrous Cycle
Background: The concepts of reproductive biology were changed by stating the ovarian reserve in postnatal mammalian females is replenished. The aim of this study was to investigate the expression of OCT4 in the mice ovarian tissue during different stages of mouse estrous cycle. Materials and Methods: The mice were considered as pro-estrous, estrous, met-estrous and di-estrous based on the cell ...
متن کاملProgestin and estrogen regulation of pulsatile LH release and development of persistent ovarian follicles in cattle.
When doses of progestin used commercially are administered to synchronize the stage of the estrous cycle among bovine females, fertility is reduced compared with that of untreated controls. The reduced fertility that results from the use of progestin based estrus synchrony regimens is associated with the development of persistent ovarian follicles. Persistent ovarian follicles develop as a resu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of animal science
دوره 49 3 شماره
صفحات -
تاریخ انتشار 1979