Characterization of postpartum ovarian follicular development pattern in crossbred cows Raja Sengodan1,*, Satheshkumar Soundarapandian2, Selvaraju Mani1, Prabaharan Vaiyapuri3, Ramachandran Masilamani2, Athinarayanan Paramasivam4 1Department of Clinics, Veterinary College and Research Institute, Namakkal-637 001, Tamil Nadu, India 2Department of Veterinary Gynaecology and Obstetrics, Veterinary College and Research Institute, Tamil Nadu Veterinary and Animal Sciences University, Orathanadu, Thanjavur-614 625, Tamil Nadu, India 3Department of Veterinary Gynaecology and Obstetrics, Veterinary College and Research Institute, Tirunelveli-627 001, Tamil Nadu, India 4Department of Livestock Production and Management, Veterinary College and Research Institute, Orathanadu, Thanjavur-614 625, Tamil Nadu, India *Corresponding Author: Sengodan Raja, Department of Clinics, Veterinary College and Research Institute, Namakkal-637 001, Tamil Nadu, India, Email: argoraja@gmail.com
Online Published on 8 February, 2024. Abstract Background The postpartum period is crucial for cattle reproduction. The length of postpartum anestrus significantly impacts reproductive efficiency. Apparently enhanced energy attribution to milk production may lead to anestrus by delaying the onset of follicular activity. The absence of an ovulation stimulus, rather than insufficient follicle growth, determines the limited duration until ovulation. The current study was aimed to document the postpartum ovarian dynamics in crossbred Jersey cows. Methods The study was conducted in ten postpartum crossbred Jersey cows. Transrectal ultrasonography was performed to record the follicular development pattern from parturition till two ovulation or 90 days postpartum on alternate days. The data was analyzed for follicular wave emergence, no of follicular waves, size of the dominant follicle and ovulatory status. Result Fourty per cent of crossbred Jersey cows showed cyclicity and rest 60 per cent of cows are in anestrum. The mean diameter size of the dominant follicle in ovulated cows is 12.2±1.2 mm and in anestrum cows is 10.6±0.4 mm. The first wave emergence is 5.7±0.3 and 10.8±5.9 day in OV and NOV group respectively. In conclusion significant difference could be observed in emergence of first, second, third, fourth and fifth follicular wave emergence, growth phase duration, rate, size of the dominant follicle and duration of wave between postpartum ovulated and anestrum cows. Top Keywords Anestrum, Crossbred jersey cow, Follicular pattern, Ovulation, Postpartum. Top |