Post-partum ovarian activity in conceived and non-conceived friesian cows during summer season in Egypt
Abstract: A total of thirty lactating Friesian cows were used to descript the post-partum ovarian activity during the first 120 days post-partum to identify the physiological reasons of conception failure of cows those were being calved during the hot season (May to August). Ovarian activity was monitored by weekly rectal palpation, and progesterone (P4) concentratio'1 which was monitored in blood serum twice weekly.The interval from parturition to first ovulation (PPOI) as well as ovarian cycle length, ovarian activity parameters (number of total ovulation, ovulatory estrus, quiet ovulation and non-ovulatory estrus cases/cow) and ovarian functional disorder (long anestrous period, percentage of quiet ovulation, non-ovulatory estrus, cystic follicles, persistent CL and cessation of the ovulation) were determined.
Sustained anestrous cases were observed in 10% of animals during the experimental period. Remaining cows were divided into two classes, conceived (G151.9%) and non-conceived cows (G2 48.1%). The length of the anestrous periods in G2 was (p<0.05) longer than in G1. G1 had (P<0.05) higher frequency distribution percentage of transient P4 rise before the first ovulation post partum than that in G2.Progesterone profile characteristics during evarian cycle prior the conception were (P<0.05) higher in G1 than those in the ovarien cycles during the post partum period in G2. The length of the anestrous periods in G2 was (p<0.05) longer than in G1. G1 had the lowest percentages of quiet ovulation, cystic follicles and false estrus than G2 while the persistent CL and cessation of the ovulation cases were observed only in G2
- Keywords: Cattle, post-partum, ovarian activity, progesterone
Publication year 2004
Pages 367-375
Availability location معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
Availability number
Organization Name
serial title Egyptian Journal of Animal Production
Author(s) from ARC
External authors (outside ARC)
    صالح عبد الحميد ابراهيم جامعة القاهرة
    سالم محمد سالم جامعة القاهرة
Agris Categories Animal physiology - Reproduction
AGROVOC
TERMS		 Cattle. Cows. Egypt. Perinatal period. Progesterone. Summer.
Proposed Agrovoc ovarian activity;
Publication Type Journal
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