VGO-0094
QUESTION
Non-hormonal method of synchronization in ewe?
OPTIONS
(A) Flushing
(B) Weaning
(C) Artificial light
(D) Pheromones
ANSWER
(C) Artificial light
EXPLANATION
Ewes are seasonally polyestrous, short-day breeders, so reproductive activity is strongly controlled by photoperiod. Manipulation of day length using artificial light can alter melatonin secretion and thereby control the hypothalamic–pituitary–gonadal axis, allowing estrous activity to be induced or synchronized without administering reproductive hormones. Therefore, artificial light is considered a non-hormonal method of synchronization in ewes.
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Veterinary Gynaecology and Obstetrics · 240 Questions
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