Here in Japan, it's much better: all medical expenses for children are free. Daycare is still a problem though, but the cost isn't nearly as awful as in America, however availability is a real problem.
The real costs add up in the 40 hour work week. School, daycare, and even the legal frameworks those operate in are intended for at least one parent to live close to the child and work at most part time.
By and large millennials in the US were the first generation where both parents were raised to work for a variety of good reasons. How many jobs really let parents cut out at 4 to commute home for a 5pm pickup?
Now consider the childcare and opportunity costs of raising children.
That's an American problem because of its car culture. In better societies, there's public transit, and/or cities/towns are walkable, so kids can just walk home by themselves. Here in Japan, kids are far more independent and have no trouble getting themselves to and from school, even with non-working parents.