High plasma urea nitrogen (PUN) concentrations are associated with decreased fertility in
lactating dairy cows. Our objective was to evaluate the quality of embryos flushed from …

Two experiments were conducted to study the relationship of blood plasma urea nitrogen
(PUN) concentrations with NH3, urea nitrogen, K, Mg, P, Ca, and Na concentrations in fluid …

High protein diets, which lead to excess production of nonprotein nitrogen such as ammonia
and urea, have been associated with reduced fertility in dairy cows. In this study we test the …

Over the past 30-40 years genetic improvement and better nutrition of dairy cows have led to
a significant increase in milk production per cow but this is associated with an increase in …

In the first of two experiments investigating the effect of dietary urea on the survival and
metabolism of ovine embryos, 30 Border Leicester× Scottish Blackface ewes received a …

The objective of this study was to evaluate the association between milk urea nitrogen
(MUN) and risk of nonpregnancy after first breeding in a commercial dairy herd in Florida. A …

The objectives of this study were to relate concentrations of plasma (PUN) and milk (MUN)
urea nitrogen to pregnancy rate in dairy cows and compare various methods of analysis and …

Previous research indicates that high plasma urea nitrogen (PUN) concentrations are
associated with decreased fertility in lactating dairy cows. The objective of this study was to …

Feeding cattle diets high in degradable crude protein (CP) or in excess of requirements can
reduce fertility and lower uterine pH. Objectives were to determine direct effects of urea and …

The purpose of this study was to evaluate the association between milk urea nitrogen (MUN)
and fertility of dairy cows using field data. The data came from 24 dairy herds belonging to …