Study on factors affecting the conception rate in Red Chittagong Cows

Abstract

The research was undertaken to identify the factors affecting the conception rate in Red Chittagong cows (RCC). A total of 130 questionnaires were filled up to collect the related data during artificial insemination (AI) and subsequently pregnancy diagnoses were done after three months of AI at five upazillas (Satkania, Chandanaish, Potia, Anwara and Raozan) in Chittagong district. Conception rate of heifers and cows delivered 1, 2, 3 and 4 calves were 64.52, 72.73, 64.86, 60 and 53.33%, respectively. Conception rates were 19.4% higher in 1 st delivered cows than that of the older cows attained the 4 th or more parities. Red Chittagong Cows producing 3 kg or more milk during AI period had lower conception rate than the low producing cows. The conception rates of RCC were higher when inseminated between 10 to >14 hours after onset of estrous and the value was 74.19%. The conception rates of RCC were higher at a thawing period of 10-12 seconds than 5-7 seconds and 15-17 seconds and varied significantly. The conception rate was 10.62% higher in RCC for semen deposited in the body of uterus than deposited at the middle of the cervix. The conception rate of RCC for normal, difficult calving, retained placenta, uterine infectious and cystic ovaries cows were 70.27, 50, 33.33, 25 and 0%, respectively and the overall conception rate of disordered cows were 31.57%. In this study, the overall conception rate of RCC was found in 63.85%. This figure can be improved by taking different measures like; insemination at observing clear mucus and 10.0-14.0 hours after the onset of estrous, thawing of straw at 37ºC for at least 10-12 seconds, heating of insemination devices, service at docile condition, placement of semen at the body of the uterus and avoid crossing of RCC with exotic blood to ensure protection from health disorder like difficult calving and retained placenta.

Characterization of physico-chemical properties of cervical mucus in relation to parity and conception rate in Murrah buffaloes

“…We observed 41.25% conception rate in clear and transparent cervical mucus (Table-1) at the time of insemination may be because of enhanced sperm penetration, proper stage of estrus and better reproductive health status. Our results are in accordance with Mufti [12]. Findings of this study had shown 47.54% conception rate in estruses with thin to moderate consistency of cervical mucus (Table-1) which might be due to enhanced migration of spermatozoa in female reproductive tract.…”

Enhancement of the Pregnancy Rate of Buffalo Cows Through Intra-Vaginal Bio-Stimulation with Penis-Like Device in the Coastal Area of Bangladesh

“…It is observed that the stimulation with PLD increased the pregnancy rate of moderate reproductive health heifers/cows after intra-vaginal bio-stimulation. Mufti et al (2010) also found that reproductive disorders in the remaining 15% of the heifer/cows were an important cause of reduced pregnancy rates which was partially supported by this study.…”

Factors Affecting Conception Rate of Dairy Cows Following Artificial Insemination in Selected Area at Sirajgonj District of Bangladesh

“…Thus, it is needed to know the time of insemination after the onset of estrous that depend on to ovulation. This is based on the fact that ovulation occurs 24 to 30 hours after the animal first stands to be mounted Mufti et al [28]. These results are more or less similar with the findings of Trimberger et al [29]; Bane [30]; Roberts [31], who reported that the insemination rate was higher when the cows inseminated between the middle and the end of the period of oestrus.…”