Published in Scientific Papers. Series D. Animal Science, Vol. LXVI, Issue 2
Written by Lora MONDESHKA, Svetoslava STOYCHEVA, Nikolay MARKOV, Miroslav HRISTOV, Tsvetelina DIMITROVA
Data is presented from 140 records of pregnancies and births of goats of the Anglo-Nubian breed, bred in the farm of the Research Institute of Mountain Stockbreeding and Agriculture - Troyan, Bulgaria. The data was used to determine the influence of sex, type of delivery and parity on the gestation length (GL) in goats. The delivery season is not taken into account, as it is always in the winter. There was a significant difference in the GL of goats that gave birth to singles and twins (p<0.001). The GL for all kids born as singles was 151.1±0.4 and twins 149.2±0.3 days. No significant difference was observed between the GL of goat that gave birth to male (151.2±0.7) and female (151±0.6) singles. A difference of more than one day was found between the GL of goats that gave birth to male and female twins (148.2±0.6 and 149.9±1, respectively). The GL in goats that gave birth to twins of different sexes was 149.4±0.4 days, and in goats from the first to the fifth parity (149.2±0.6; 149.9±0.5; 149.0±0.6; 150.5±0.6; 150.9±0.7 days) respectively.
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