Visual appearance can be very deceptive. There are plenty of very 'conventionally' attractive people who have less obvious health disorders ranging from infertility to women with high likelyhood of death during birth to mental disorders that would cause problems for raising a child.
Not all healthy appearing prime age females can reproduce, obviously. Healthy, young adult, well nourished appearance is still a good indicator towards 9 months of reproductive value.
> That's really not super helpful
But it's more helpful than most of the other social media fast alternatives of someone you don't know well. You won't be getting their medical records. On a thirty second first glance yay/nay a few healthy photos looking good doing aerobic activities is as close as you're going to get to evidence of sexual fitness for fetal survival without asking intrusive and creepy sounding medical questions.
What you wrote there
> A healthy presumably fertile body, kempt and sane enough looking that the fetus will survive nine months.
also applies to men. Your comments suggest you’re too biased to realize as much.