ANSC Feeds Practice Exam

Restricting protein intake of pregnant heifers during late gestation affects calving difficulty in which way?

1. Decreases body weight slightly

2. Increases dystocia

3. Both A and B

4. Decreases milk production

The correct answer is: Both A and B

During late gestation, the nutrient requirements of pregnant heifers increase significantly, especially for protein, which plays a critical role in fetal development. If the protein intake is restricted during this phase, several physiological effects can occur. One of the primary concerns is increased dystocia, or calving difficulty. Adequate protein is essential for the proper growth and development of the fetus. Inadequate protein can lead to smaller, underdeveloped calves, which may consequently result in complications during the birthing process. This can manifest as increased labor duration, increased need for assistance during calving, or even higher risks of birthing injuries to both the calf and the heifer. Additionally, restricting protein can also lead to a slight decrease in body weight in pregnant heifers. This reduction in body weight may not only impact the heifer's overall health but can also complicate the delivery process, as a lighter or frailer heifer might struggle more during labor. Together, these factors create a compelling rationale for the conclusion that restricting protein intake during late gestation both decreases body weight slightly and increases the likelihood of dystocia. This understanding highlights the importance of proper nutrition in maintaining the health of both the mother and the developing calf, ensuring better outcomes during cal