Original scientific paper

Prevalence and certain characteristics of mid-cyclic estrus in crossbred cows

Pankaj Sood ; Department of Animal Reproduction, Gynaecology and Obstetrics, College of Veterinary and Animal Sciences, Palampur, India
Navneet Kumar Vasishta ; Department of Animal Reproduction, Gynaecology and Obstetrics, College of Veterinary and Animal Sciences, Palampur, India
Madhumeet Singh ; Department of Animal Reproduction, Gynaecology and Obstetrics, College of Veterinary and Animal Sciences, Palampur, India
Neeraj Pathania ; Department of Animal Reproduction, Gynaecology and Obstetrics, College of Veterinary and Animal Sciences, Palampur, India

Abstract

Cows presented for artifi cial insemination (A.I.) may not always be in a normal estrus. Mid-cyclic estrus (MCE) may be one such situation when the cows may be inseminated or treated, thereby leading to economic losses. The present study comprised of 2092 crossbred cows presented for A.I. during a normal estrus (E1). Some of these cows were presented again during MCE (Group I; n = 51), whereas others were not reported for any evidence of MCE (Group II; n = 2041). Some cows in Group I (n = 42) and Group II (n = 525) were submitted again during subsequent normal estrus (E2) for second A.I. The prevalence of MCE was 2.43% and was expressed at an average interval of 9.1 ± 0.5 days after E1 in Group I cows. The average interestrus interval between E1 and E2 was 21.2 ± 1.2 days in Group I, which was similar (P>0.10) to 20.9 ± 1.1 days in Group II. In Group I, good uterine tone was more common (67.8%) during E1, whereas mild (34.5%) or moderate (48.3%) uterine tone was preponderant during MCE. Also, the genital discharge in majority of the Group I cows was clear, copious and stringy (80.6%) during E1, whereas the majority of these cows had either clear and scanty (61.3%) or turbid and scanty (25.8%) genital discharge during MCE. A large proportion of Group I cows (82.3%; 42/51) did not conceive from A.I. during E1. This requires endocrine readdresal. It was concluded that cows presented for A.I. with a subdued estrus in the form of a scanty genital discharge and varying uterine tone, most likely mild or moderate, should be ruled out for MCE, especially in the absence of a proper breeding record.

Keywords

crossbred cows; mid-cyclic estrus

Hrčak ID:

37320

URI

https://hrcak.srce.hr/37320

Publication date:

20.4.2009.

Article data in other languages: croatian

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