Plasma insulin in ewes during pregnancy and lactation effect of nutritional state during late pregnancy

Grizard, J.; Tissier, M.; Theriez, M.; Pion, R.

Annales de Biologie Animale Biochimie Biophysique 19(1A): 73-78


ISSN/ISBN: 0003-388X
Accession: 006129881

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Twenty-eight Limousine ewes were used in a factorial experiment. The experimental treatments included 2 levels of energy intake during 7 wk prepartum (high:H; low:B) and 2 states of body reserves at 8 wk prepartum (fat:G; lean:M). The animals bore or were suckling twins (D) or singles (S). Preprandial and postprandial plasma insulin were recorded at 38, 24 and 10 days prepartum and at 5, 13, 26 and 40 days postpartum. During pregnancy there was a high level of plasma insulin in the lean ewes bearing twins and receiving the high level of energy intake. Plasma insulin decreased during late pregnancy and increased at the beginning of lactation.