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Ruminant Nutrition and Forage Utilization
Asian-Australasian Journal of Animal Sciences 1995;8(4): 321-323.
https://doi.org/10.5713/ajas.1995.321    Published online August 1, 1995.
Observations on fertility parameters following superovulation in jersey cattle
N. Ullah, M. H. Javed, S. Akhtar
Observations were recorded regarding various fertility parameters on 26 Jersey donor cows following superovulation under tropical conditions. These cows, in their mid-luteal phase were treated with 2,500-3,000 i.u. PMSG or 28-40 mg FSH followed by 500 關g PGF2慣 injection 48-60 hours later, to induce oestrus. The cows were bred artificially twelve hours following standing oestrus. Embryo collection was carried out 7 days after oestrus. PGF2慣 was injected to each donor cow after embryo recovery to regress the corpora lutea. Fertility data(PGF2慣-Oestrus interval, services per conception, days between embryo collection and successful service and any pathololgical condition) were recorded. PGF2慣-Oestrus interval and correlation (r) between number of corpora lutea and PGF2慣-Oestrus interval were 30.9 6.3 and 0.17, respectively. Of 26 trated donors, 19 conceived within a period of 91.7 18.8 days after embryo recovery. Average services per conception were 2.3 0.3. Only two cows developed metritis which conceived after treatment with antibiotics. These observations indicated no profound adverse effect of superovulation on subsequent reproduction of donor cows, except some effect on services per conception, under tropical conditions.
Keywords: Cow; Superovulation; Fertility; Tropical Conditions

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