It would be interesting if they did this kind of survey in Japan. It scores the differences between the states with the best child-rearing environments and those with the worst from various perspectives among the US states.
2017's Best & Worst States to Have a Baby
It is measured with a total of 20 indicators from four categories: cost of childbirth, health care environment, child care environment, and ease of living, based on the number of child care centers per capita, certified child care centers, number of OB/GYNs and doctors, etc.
Below is a map of the U.S. ranked by state, as published in the above article. This is an interesting way of showing it!
Vermont is in first place and Mississippi is in last place. You can see the list in the article above, if you like.