Abstract - This study reviewed the occurrence of reproductive diseases in ruminants attended at Veterinary Teaching Hospital, Bangladesh Agricultural University, Mymensingh from 2004 to 2018. Overall occurrence of reproduc- tive diseases was 13.48% in 32981 diseased ruminants. A total of eight diseases was recorded in cattle among which, occurrence of repeat breeding syndrome (46.55%) was the highest, followed by anestrus (14.74%), mas- titis (13.97%), dystocia (12.79%), retained placenta (5.89%), uterine and vaginal prolapse (3.49%), clinical endometritis (1.42%), udder edema and abscess (1.14%) in cattle. In small ruminants, occurrence of mastitis (29.18%) was highest followed by dystocia (28.83%), udder edema and abscess (23.19%), clinical endometritis (18.80%). Occurrence of RBS (67.07%) and uterine and vaginal prolapse (6.08%) were significantly (P<0.01) highest in Holstein Friesian crossbred cows and occurrence of mastitis (22.62%), udder edema and abscess (9.52%) were significantly (P<0.01) highest in Sahiwal crossbred. RBS (63.29%) and Dystocia (55.95%), mas- titis (25.86%), udder edema & abscess (17.52%) were non-significantly (P>0.05) highest in Black Bengal Goat and clinical endometritis (13.70%) in Sheep. Considering the age, mastitis (17.06%) and anestrous (27.17%) were significantly (P<0.01) highest in >6yrs and <3yrs old cows respectively. Whereas, dystocia (51.03%) was significantly (P<0.01) highest in 2-<4yrs aged small ruminants. Retained placenta (5.68%) was signif- icantly highest (P<0.01) in cattle in winter season. Dystocia (72.38%), mastitis (34.16%) and udder edema and abscess (19.65%) were significantly (P<0.01) highest in summer, rainy and winter season, respectively, in small ruminants. This study revealed marked effects of species, breed, age and seasons on the occurrence of various reproductive diseases in ruminants. It may help veterinarian to develop strategies for the controlling of mostly occurred reproductive diseases in ruminants at farm level.