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Postpartum performance of buffaloes treated with Gnrh to overcome the impact of Placenta retention

Abstract

This study aimed to investigate impacts of GnRh treatment on post-partum productive and reproductive performance of buffaloes subjected to placenta retention. A number of 30 female buffaloes were used in the study among them 20 buffaloes were detected with retained placenta (RP), while 10 buffaloes were normally calved (NRP). Buffaloes with RP were divided into two groups (10 buffaloes each) where group (RPT) were injected with 10 ml GnRH at the 7th day postpartum and group (RPC) served as control group. Blood samples were collected twice weekly from each buffalo cow during late pregnancy and postpartum period for determination of progesterone (P4), estradiol 17ß (EST) as well as some blood metabolites. Placental tissue samples were taken from four animals with normal and retained placenta for histological examination. Postpartum loss in live body weight was greater (P <0.01) in NRP buffaloes than animals with RP. Differences between groups in calf birth weight (CBW) were insignificant while differences between newborn males and females were highly significant (P < 0.01). Volume of fetal fluids was greater in NRP group comparing with the other groups (P< 0.01) whereas no significant differences were detected in weight of fetal membranes between groups. Time elapsed for placenta expulsion in was 4.23, 17.26 and 18.7 hr. in NRP, RPT and RPC groups, respectively. Sex of newly born calf had only a significant effect (P < 0.01) on CBW and CBW/DAM. The normal group of buffaloes (NRP) achieved the least (P< 0.0) calving interval (CI) and days open (DO) as compared with buffalo groups with RP. However, GnRH treatment had significantly (P < 0.05) reduced CI and DO for group RPT than that for group RPC by 10.41% and 28.33%, respectively. No. of services per conception declined in response to GnRH treatment (2.6) when compared with RPC group (3.5) Differences between the studied groups in milk traits (total milk yield, days in milk and daily milk yield) were highly significant (P < 0.01) not only in the current milking season but also in the previous and next milking season Buffaloes treated with GnRH (RPT group) achieved greater milk productivity (13.27%) than RPC group. Post partum concentrations of P4 were significantly (P <0.05) greater in NRP animals than that in buffaloes with RP throughout the experimental months GnRH treatment increased significantly (P < 0.05) postpartum EST concentrations during 5th to 8th week as compared with non-treated animals. Concentrations of all studied metabolic parameters were relatively lees in RP groups than that in non retained group (NRP) GnRH treatment had relatively ameliorated the metabolic function in treated buffaloes via increasing concentrations of blood total protein, glucose, creatine, creatinine, clacium and inorganic phosphorus. The histological sections revealed dismaturation of the RP denoted by limited number of trophblastic giant cells, decomposition and tragmentation of the placental tissue and chorionic villi concomitant with hyperplasia in the chorionic epithelial cell of the villi.

Publication year

2010

Pages

225-233

Availability location

معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى- الجيزة

Availability number

Organization Name

Animal Production Research Institute (APRI)

serial title

Journal of American Science

ISSN