Drickamer, L. C. 1987. Intermittent stimulation and acceleration of puberty by urinary chemosignalsin female mice (Mus musculus domesticus). Biology of Reproduction 37, 89-95.

A bedding of ground wood shavings was changed once each week. Pregnant females and female test mice were provided with cotton squares (Nestlets, Ancare Corp., Manhasset,NY; 4.8 X 4.8 X 0.6-cm thick) for making nests.