The role of nutritional supplementation on the outcome of superovulation in cattle

The results of consecutive superovulations in cows by induction with various exogenous progesterone routes

“…Superovulation responses in cows are affected by many factors, such as individual response, endocrinological and ovarian status, breed, age, season, number of stimulations, type of gonadotropin used, and feed intake (1)(2)(3). The intensive control of ovarian function is necessary for successful superovulation (4).…”

Reproductive performance of ewes grazing lucerne during different periods around mating

“…The lack of association between plasma urea and reduced performance is perhaps not surprising because greater protein/urea concentrations are more likely to be detrimental when the animal is in negative energy balance, or if the amount of protein fed is well beyond what is recommended (Velazquez, 2011). The ewes in the current study were gaining weight so ewes were in positive energy balance while grazing lucerne.…”

Maternal control of oocyte quality in cattle “a review”

“…Moreover, a high correlation between urea concentrations in blood and FF was found in dairy cow (Hammon et al, 2005). These concentrations, when high, can lead to a subsequent reduction in oocyte developmental competence (Velazquez, 2011). However (Kenny et al, 2002), did not find any association between elevated plasma urea and subsequent embryo survival rate.…”