Another question might be...what % of couples can get pregnant without artificial means? And how is that changing over time?
For perspective there are estimates out there that IVF will be involved in 10% of pregnancies in the near future. Some of that is it getting better, cheaper, and more accessible obviously...but we are talking about something (pregnancy) that's technically "free".
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8722744/#:~:tex....
Our brains and hormones are poorly understood.
It is a mostly non-existent argument but it's still something that's important to consider.
Also, just technically speaking, we know there are hormones that absolutely can prevent you from being able to get pregnant - that's what the pill is.
https://www.endocrine.org/topics/edc/what-edcs-are/common-ed...