Prostaglandin based estrus synchronization in cattle: A review

Abstract

Reproductive cyclicity provides cattle with repeated opportunities to become pregnant. Understanding the physiology and endocrinology of the estrus cycle gives a great opportunity for reproductive management and control of the estrus cycle. To manage and control the cycle, there are lot of assisted reproductive technologies, of them estrus synchronization with prostaglandins (PGF2α) is the one. PGF2α is known to have the ability to regress the corpus luteum (CL). The success of the synchronization program is limited by numerous intrinsic and extrinsic factors like proper levels of nutrition, body condition, health, good estrus detection technique, semen quality, proper time of insemination, and efficiency of AI technicians. However, inadequacy in any of these areas can spell disaster for an estrus synchronization program. The choice of a protocol which fits the specific situation under consideration is the base for the success of any prostaglandin-based estrus synchronization programs. As a conclusion, the choice of technically right and practically feasible protocol is essential for a successful breeding program.

Estrus response to estrus synchronization using prostaglandin nanoparticle in beef cattle in Majalengka regency

“…The score BCS 2.5-3 was selected and then used in the study. Under conditions of BCS ≤ 2.5, the livestock experienced malnutrition, which caused disruption to the estrous cycle of rete conception [16,17]. Bihon and Assyfa [17] state that synchronization implemented with poor-body-conditioned animals results in a low level of response to estrus and pregnancy rates.…”

“…Under conditions of BCS ≤ 2.5, the livestock experienced malnutrition, which caused disruption to the estrous cycle of rete conception [16,17]. Bihon and Assyfa [17] state that synchronization implemented with poor-body-conditioned animals results in a low level of response to estrus and pregnancy rates. On the other hand, livestock that are too fat will experience problems with conception and abnormalities in the reproductive cycle [18,15].…”

Determination of estrus duration based on cervical mucus characteristics in Aceh cattle using camera-equipped artificial insemination endoscope

“…The success of the estrus synchronization is determined by intrinsic factors (proper diet, BCS, health) of cows and extrinsic factors such as correct heat detection techniques. The inadequacy of those factors resulted in the estrus synchronization to be not as expected (Bihon and Assefa, 2021). Estrus synchronization must be accompanied by careful estrus detection to achieve a high conception rate (Syafruddin et al, 2016).…”

Tasa de concepción en vacas lecheras inseminadas a celo detectado o a tiempo fijo

“…Por ello, diversos protocolos permiten sincronizar el ciclo estral e inducir la ovulación para realizar la IA en un momento determinado como lo es el protocolo Ovsynch, el cual consiste en el uso de la hormona liberadora de gonadotropina (GnRH) y prostaglandina (PGF2α) para sincronizar el momento de la ovulación en vacas y vaquillas (Fricke & Wiltbank, 2022). El manejo de los ciclos estrales, para que todas las hembras ovulen en un periodo breve de tiempo, es el objetivo que ha estimulado el desarrollo de numerosas líneas de investigación a través de los años (Bihon & Assefa, 2021). Estas investigaciones, sobre todo las realizadas en las últimas décadas, llevaron al diseño de protocolos que permiten realizar la inseminación artificial (IA) sin la necesidad de detectar el celo, modalidad denominada comúnmente IA a tiempo fijo (IATF) (Bó et al, 2016).…”