I think infant care is generally speaking done better by women (all disclaimers about individuals vs. group statement apply), but I’m not sure why it is.
The humanist (a word I prefer to “feminist”) part of me wants to say that it’s because of cultural conditioning. Women, theoretically, helped out with babies more as children themselves and so learned what to do. While the boys were out hitting each other with sticks, we were called upon by our mothers and aunts to “help with the baby.” Baby girls recieve positive reinforcement from their parents when playing with dolls, where boys don’t.
Problem is, I never held a baby before my own, nor was I at all interested in babies as a kid, but I was still pretty good at it - better than most men I see. My step-brothers were pressed into baby duty as kids, and they’re still awkward and unsure with their own. Of course, this is going back to individuals, as opposed to a group. Anecdote /= data, and all that.
Asking my friends with kids about their previous baby experience doesn’t really reveal that women spent a lot of time with babies growing up - most of us come from small families, rather than the old style farm family with a dozen kids. Most of us weren’t around babies (except as toddlers) until we had our own. And, yeah, the men are clumsier and less able to read babies’ cues. I also notice that they’re less likely to be creative and try something new without prompting. If a baby’s crying, they’ll hand the baby to a woman instead of trying jiggling, swinging, rocking, walking, etc.
But don’t studies show that women are better at reading body language and facial cues of adults, as well? Maybe the baby thing is part of the same deal.
None of this is to say that men couldn’t be effective infant caregivers. None of this is to say that we shouldn’t share child care with them! I’m certain there are some individual men for whom it comes naturally. Every other man out there can learn it with some time and experience. But without teaching, I have to agree that women seem to have an innate advantage.
There’s no reason a man couldn’t stay home with the newborn and suffer a career gap if it was the best thing for the family. (That is, if her career would suffer more from a lapse, or she makes significantly more money.) I don’t think they’re THAT much less good at it so as to endanger the baby, and any baby care gap can quickly be overcome with experience and learning.