Abstract
Oestrous Response and Conception Rate in Malabari Cross-Bred Goats Following Two Different Oestrus Synchronization Protocols
Highlights
The reproductive management of goats on a large scale becomes difficult due to various contributing reasons like poor oestrus expression, lack of heat detection techniques
Synthetic Gonadotropin Releasing Hormone (GnRH) preparations, equine chorionic gonadotropin, human chorionic gonadotropin, progestagens administered by different routes and prostaglandin (PGF2α) in different combination and regimen are used for oestrus synchronization in ruminants (Whitley and Jackson, 2004)
The difference in the time taken for the onset of oestrus between the two groups in the present study may be due to the differences in the synchronization regimens The oestrus intensity scores in group I (Ovsynch) ranged from 6-19 with a mean (± S.E.) intensity score of 13.74 ± 1.57
Summary
The reproductive management of goats on a large scale becomes difficult due to various contributing reasons like poor oestrus expression, lack of heat detection techniques. Oestrus synchronization and fixed time insemination is useful when oestrus expression is poor or there is lack of time to conduct the same to augment fertility in goats (Rahman et al, 2008). Oestrus synchronization can be carried out by the conventional methods like alteration in the light exposure period, buck exposure and the use of hormonal treatments. Synthetic Gonadotropin Releasing Hormone (GnRH) preparations, equine chorionic gonadotropin (eCG), human chorionic gonadotropin (hCG), progestagens administered by different routes (oral, injections, vaginal pessaries) and prostaglandin (PGF2α) in different combination and regimen are used for oestrus synchronization in ruminants (Whitley and Jackson, 2004). Ovsynch protocol involves GnRH- PGF2α -GnRH treatment. In Progestagen protocol, exogenous progestagen is given between GnRH and PGF2α to prevent premature expression of estrus prior to PGF2α (McKinniss et al, 2011)
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