The aim of this study was to detect associations
between fertility parameters in dairy cows and the level
of UFA in bulk tank samples as a proxy for the dietary
fatty acid profile on that herd. Milk fat typically contains
about 30% UFA, of which the main proportion are 18:1 FA
(20–30%), followed by 16:1 and 18:2, both representing
about 1–3% of FA (Jensen, 2002). There is considerable
interest in increasing the UFA as it contains more saturated
FA compared to plant oils which could harm long-term
health of consumers (Dewhurst et al., 2006). The level of