Table 1.

Timeline for data collection in Peromyscus mice

Month 1	Month 10	Month 14	Month 15	Month 16
Females born	Females in aggression tests	Pairing of females	Birth of litter No. 1	Birth of litter No. 2
Females were raised as cross-fostered, in-fostered or control mice (see text for description)	Data were previously reported in Bester-Meredith and Marler [2007]	Females were paired with males from the same species and treatment condition	Measurements of maternal behavior in females housed with mate and pups	Females sacrificed on day 3 after the birth of pups