Seasonal effects: 'Winter foals' are smaller than foals born in summer

Friday, August 4, 2017 - 09:52 in Earth & Climate

Although seasonal effects such as reduced metabolic activity in winter are known even in domesticated horse breeds, effects on pregnant mares and their foals have not been investigated. Researchers have now demonstrated that seasonal changes have a strong influence on pregnancy and fetal development. Foals born early in the year are smaller than those born at a later time and these differences persist to at least 12 weeks after birth.

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