We are seeing a huge rise in problem pregnancies, birth defects, etc. There are likely a number of contributing factors to that reality. It isn't PC to wonder if maybe the rise of female careers is at related. That is viewed as antifeminist and so on.
Women routinely take time off work to care for relatives, whether their own children or other relatives. They get no credit for this vital work and how it impacts the health of people.
My experience suggests there isn't any point in trying to prove it. It won't get taken seriously anyway.
It is common knowledge that small kids in daycare have more health issues. My sister, who has a career and works for the CDC, used to quote studies at me about that. She managed to stay home with her only child for the first few years.
But, of course, in searching for info to support the idea that small kids in daycare get sick more, one of the most prominent pieces I can find is a PC piece assuring parents that the increased negative health effects of early daycare "has a protective effect later." Meanwhile, the study completely excludes data on, for example, hospital stays. Looks nicely spun to me.
Other pieces outright admit that staying home is simply not an option for many women and go on to talk about how best to protect your child from germs at daycare rather than exploring statistics. Yet the fact that you can google the question and there are pieces trying to address it at all suggests it is a real issue and parents ask about the problem a lot. But society can't fix it, so it isn't really comfortable to admit that it is a real issue.
Home cooked meals are also generally healthier than takeout, microwave meals, etc. Two career couples tend to not do a lot of cooking from scratch. Diet significantly impacts health.