Factors affecting conception rates when using sex sorted semen in Western Australian dairy heifers
Year: 2019
Type: dissertation
Abstract: The purpose of this study was to evaluate the effect of oestrous detection within a 5-day timed artificial insemination program (TAI) on conception rates in dairy heifers when using sex sorted semen.This was compared to a control group using conventional semen..A total of 198 healthy dairy heifers were subjected to a 5 Day Co-synch protocol.Animals were determined to be in oestrus based on the activation of a scratcher detection patch and were assigned into two treatment groups: conventional semen (n=77) and sex sorted semen (n=76).Semen type and heifer weight had statistically significant and positive effects on conception rates (P<0.05,P0.01).Insemination technician, body condition score, bull, heat and reproductive tract score did not affect pregnancy per artificial insemination (P/AI).Further research should be conducted on a larger sample size to explore the potential effects of these factors.
Author: Felicity Jane Marshall Searle
Language: English
Subfield: Animal Science and Zoology
Domain: Life Sciences
SDG: Zero hunger
Open Access status: green
OpenAlex ID: W2972248758