Do I have to wait to travel after a tummy tuck? Dr. Eric Chang, Columbia University College of Physicians and Surgeons Answered Jan. 26, 2012 19 years experience in Surgery - Plastics
On the third day, the ears unfold with the ear canal opening on the tenth day. Eyes open on the fifteenth day, and the young are weaned between day 25 and 35. Deer mice can reproduce when they are 35 days old, but they usually breed for the first time at 49 days. 1  Key Reproductive Features. 2  iteroparous. 3  year-round breeding. 4  gonochoric/gonochoristic/dioecious (sexes separate) 5  sexual. 6  fertilization. 7  viviparous. 8  post-partum estrous.
Mice *can* get pregnant as early as 4 weeks. However, it is unbelievably hard on them if they do. Never breed your mouse that young, no matter what. In addition, make sure you separate your babies (males from females) at 4 weeks of age so this doesn't happen. It is generally recommended to wait until the female is 12 weeks old or older before she is bred for her first litter. Breeding sooner is bad for the mother and the babies.