How Does the Birth of a Child Affect How Heterosexual

How does the birth of a child affect how heterosexual couples navigate child care at home?

A) Most women and men plan to divide child care equally,a 50-50 split.
B) Many women plan to do somewhat more child care than their husbands but end up doing less than expected.
C) Many women plan to do somewhat more child care than their husbands but end up doing even more than expected.
D) Many women plan to do somewhat more child care than their husbands but end up doing all of it.