Not all indeed. But across a population of millions, that has a serious impact.
The US has 330 million people, and assuming a roughly equal split means you're looking at ~165 million Men and 165 million women.
Assume that 1/3 of those 165 million women are able to have kids -- they're not too young, or post-menopausal. That's ~55 million women who can have kids.
If there is even a tiny amount of issues with being over age, like that only impacts 1-4% of pregnant women, that's still anywhere form 0.5 to 2.2 million pregnancies.
2 million babies that are going to not happen, or have problems. There are US states with fewer people. Even a tiny variance here can impact large populations greatly.
The US has 330 million people, and assuming a roughly equal split means you're looking at ~165 million Men and 165 million women.
Assume that 1/3 of those 165 million women are able to have kids -- they're not too young, or post-menopausal. That's ~55 million women who can have kids.
If there is even a tiny amount of issues with being over age, like that only impacts 1-4% of pregnant women, that's still anywhere form 0.5 to 2.2 million pregnancies.
2 million babies that are going to not happen, or have problems. There are US states with fewer people. Even a tiny variance here can impact large populations greatly.