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INDUCTION OF OVULATION AND OVARIAN CHARACTERISTICS OF PREPUBERTAL GILTS TREATED WITH HUMAN CHORIONIC GONADOTROPIN OR KISSPEPTIN
(Inst Zootecnia, 2016-01-01)
In view of its similar structure and function to luteinizing hormone (LH), human chorionic gonadotropin (hCG) has conventionally been used as the main hormone to induce estrus and ovulation in sows. Recently, it has been ...
Seminal plasma nerve growth factor signaling on the reproductive physiology of female llamas
(BRAZILIAN COLL ANIMAL REPRODUCTION, 2022)
The ovulation mechanism is one of the fascinating physiological processes in reproductive biology in mammals. From the reproductive point of view, the species have been classified as spontaneous or induced ovulators. ...
Inducing ovulation with oestradiol cypionate allows flexibility in the timing of insemination and removes the need for gonadotrophin-releasing hormone in timed AI protocols for dairy cows
(Csiro Publishing, 2017-01-01)
The effects of addition of gonadotrophin-releasing hormone (GnRH) to a progesterone plus oestradiol-based protocol and timing of insemination in Holstein cows treated for timed AI (TAI) were evaluated. Cows (n=481) received ...
Review: Unveiling the effect of beta-nerve growth factor on the reproductive function in llamas and cows
(SPRINGER INTERNATIONAL PUBLISHING AG, 2023)
© 2023 The Author(s)The actions of the beta-nerve growth factor (β-NGF) on the neuroendocrine and reproductive system have challenged classical views on the control of reproductive function. After endometrial absorption, ...
Use of estradiol benzoate to induce ovulation in a short-term protocol for fixed-time AI in sheep
(2015-01-01)
The aim of this study was to test the hormonal protocol for fixed-time artificial insemination (TAI) with a progesterone vaginal device for six days applying equine chorionic gonadotropin (eCG) or estradiol benzoate (EB) ...
The use of hcg for inducing ovulation in sheep estrus synchronization impairs ovulatory follicle growth and fertility
(Multidisciplinary Digital Publishing Institute, 2021-04)
Currently, there is an intense effort to find an alternative hormone to eCG to induce ovulation after estrus synchronization treatments in sheep. One of the proposed alternatives is based on the use of hCG, but the results ...
Inducing ovulation early postpartum influences uterine health and fertility in dairy cows
(Elsevier B.V., 2014-06-01)
The objective of the current study was to evaluate the effect of GnRH early postpartum on induction of ovulation, uterine health, and fertility in dairy cows. Holstein cows without a corpus luteum (CL) at 17 +/- 3 DIM were ...
Estrous behavior and the estrus-to-ovulation interval in Nelore cattle (Bos indicus) with natural estrus or estrus induced with prostaglandin F2 alpha or norgestomet and estradiol valerate
(Elsevier B.V., 1998-02-01)
Estrous behavior and the estrus-to-ovulation interval are essential for estimating the best time to artificially inseminate cattle. Because these parameters are not well characterized in the Nelore breed (Bos indicus), the ...