Question

question 48 1 pts body temperature drops 1 to 3 degrees to 37.2°c (99°f) about 24 hours before stage ii of labor in about 85% of bitches. this temperature drop is related to calming effects of the hormone relaxin. decreased activity of the bitch. the abrupt decrease in progesterone. delivery of the placenta.

Explanation:

In bitches, the drop in body - temperature about 24 hours before Stage II of labor in about 85% of cases is related to the abrupt decrease in progesterone. Progesterone has thermogenic effects, and its sudden decrease leads to a drop in body temperature. The calming effects of relaxin are more related to loosening of pelvic ligaments, decreased activity is not the main cause of this temperature change, and the delivery of the placenta occurs after the birth of the puppies, not related to this pre - labor temperature drop.

Answer:

the abrupt decrease in progesterone.