The present study was conducted to assess and compare
the effects of diets supplemented with plant-derived n-6
PUFA (predominantly in the form of LA) or n-3 PUFA (predominantly
LNA) on reproduction in lactating dairy cows.
Ovarian function was monitored by steroid hormone analysis
and ultrasonography, and uterine activity was assessed
by measuring the 13,14, dihydryo-15 keto PGF2a (PGFM)
produced in response to administration of oxytocin.
Metabolic hormones (insulin and insulin-like growth factor I
(IGF-I)), cholesterol and non-esterified fatty acid (NEFA)
concentrations were monitored to investigate whether
dietary PUFAs influence reproductive performance via
alterations in energy balance