author(s)
R Deka, KC Nath, M Bhuyan, NC Nath, GC Das, N Deka and M Islam

abstract
A study was conducted on 60 Swamp buffalo cows and heifers maintained at Network Project on Buffalo improvement (Swamp), College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, Assam to accumulate data on reproductive performance and incidence of reproductive disorders. Reproductive performance was studied from the records maintained in the farm and incidence of reproductive disorders was studied by clinico-gynaecological examination of the animals and analyzing their breeding records. Average age at first calving, post-partum oestrus interval, service period, gestation period and intercalving period was 1841.75 ± 95.18, 262.90 ± 30.27, 331.63 ± 65.51, 304.18 ± 2.05 and 795.39 ± 104.53 days respectively. Anoestrus was the most common reproductive disorder in Swamp buffalo occurring in 45.83 percent cows and 87.50 percent heifers.