The most we’ve seen as plausible arguments are women hormone fluctuations during pregnancy causing disruptive development of the fetus.
Yup, and even then, there have been no consistent endocrinology studies to back up that point. If you surf through enough studies, you'll find that the actual premise for that is based on speculative conjecture:
https://academic.oup.com/endo/article/152/8/2937/2457178
Basically, it's just guesswork that there might be some endocrines that might affect the orientation of a fetus. And this premise is based entirely on... theorycrafting.
Yup, and even then, there have been no consistent endocrinology studies to back up that point. If you surf through enough studies, you'll find that the actual premise for that is based on speculative conjecture: https://academic.oup.com/endo/article/152/8/2937/2457178
Basically, it's just guesswork that there might be some endocrines that might affect the orientation of a fetus. And this premise is based entirely on... theorycrafting.
I wish I was making that up.
This is the unfortunate result of “science” having to try and compensate for societal demands