Synchronization of time of development of ovarian follicular waves in South American Camelids
| Autor: | Marcelo Miragaya, Maria Florencia Gallelli, Marcelo Alfredo Aba, Enzo German Zampini, Carolina Paula Bianchi, Virginia Luz Trasorras |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Ovulation
medicine.medical_treatment media_common.quotation_subject Biology Synchronization Andrology 03 medical and health sciences Follicle 0302 clinical medicine Endocrinology Ovarian Follicle Ovulation Induction Food Animals Follicular phase medicine Animals Ovarian follicle Insemination Artificial media_common 030219 obstetrics & reproductive medicine Artificial insemination 0402 animal and dairy science 04 agricultural and veterinary sciences General Medicine medicine.disease 040201 dairy & animal science medicine.anatomical_structure Atresia South american Female Animal Science and Zoology Estrus Synchronization Camelids New World |
| Zdroj: | Animal Reproduction Science. 208:106105 |
| ISSN: | 0378-4320 |
| Popis: | South American camelids (SAC) are induced ovulating animals. In unmated females, ovarian follicle development occurs in waves of growth and regression, while mating when there is the presence of a mature follicle leads to ovulation. The capacity to respond to an ovulatory stimulus depends on the stage of the follicular wave development. Treatments to control ovarian follicular development have been performed to synchronize timing of wave emergence and development of the dominant follicle at a predictable time. Thus, synchronization of the time of follicular wave development allows for performing fixed time mating or artificial insemination, and superestimulatory treatments for multiple follicule development. Protocols are based on removal of the suppressive effect of the dominant follicle, that can be achieved by physical ablation or by inducing ovulation (with LH or GnRH) or atresia (with progesterone or progestagens alone or combined with estradiol) of this follicle. Differences between treatments should be taken into consideration when choosing a protocol for fixed time mating or artificial insemination, especially when applying the use these technologies for SAC production by commercial enterprises. Furthermore, the objective of applying synchronization protocols should be considered, because not all of these are effective in inhibiting follicular growth before initiation of a superestimulatory treatment for multiple follicle development. |
| Databáze: | OpenAIRE |
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