Among other things: Society is generally okay with men having sex outside of marriage. It is much less okay with women doing the same. Men are generally not subjected to criticism for being working fathers. Quite the contrary: they are criticized if they are unemployed and have children. Women are routinely expected to choose between career and family.
I have in the past commented on the fact that insurance typically did not cover female birth control, but often did cover Viagra. The subtext there: Fertile young women aren't entitled to sex, but men are, even if they are so old they need help performing. Such observations were typically met with open hostility and dismissal, not like the observation held any water.
The ACA changed that some. From what I gather, most policies are required to cover some sort of female birth control, unless it falls under religious exception iirc. So this is mostly no longer true, but was at one time.
My understanding is the current administration is trying to repeal this and stop covering female birth control, so such gains cannot be assumed to be permanent. It's all too easy to reverse them and reinstate historical "barefoot and pregnant" style gender norms for women.
Edit: For context, I'm American and 53 years old. So I'm talking about (historical, before the ACA) American insurance practices here.