Men and women play two different, complementary, and equally necessary roles when rearing children. Still, rearing children is more time-consuming for the woman than it is for the man.
Numerous studies and several meta analyses found no significant differences between children raised by 1 man and 1 woman, 2 men, or 2 women. Studies or interpretations which found differences made errors such as not controlling for divorce.[1]
[1] https://whatweknow.inequality.cornell.edu/topics/lgbt-equali...