Age related effect on pregnancy rate and pregnancy wastage in thoroughbred mares bred during different heat cycles postpartum under subtropical conditions

This investigation reports the correlation of age and heat cycles on pregnancy rate wastage in Thoroughbred mares bred during foal (FH), second (SH) third (TH) a commercial stud farm Kunigal, Karnataka, India. The was not influenced by different post partum. mare’s showed that significantly conception FH TH postpartum, while it significant SH. did influence FH, SH or TH, but higher early embryonic mortality than mares. While abortion postpartum. In conclusion, reproductive efficiency with respect to dependent, looked independent TH. optimum for better between 6 13 years all aged (>18 old) reduced due increased losses.