In our society system now before couples come together their do go for test for genotypes and so on and most times these test comes out negatively affecting them were by the man might be AS and the woman AS too and the result will aromatically disrupt the marriage
But back then our fore father's don't have time to check all this things and there were happily married and giving birth to numerous healthy children is it that things have changed since then or what's wrong your opinions is recommended
throughout history we did not rely on gene testing. we just lived based on evolution. whereby yes families did produce offspring with disabilities, whereby the lineage of a families ancestry becomes weak or strong based on natural selection.
genetic testing was not some old tradition.. because gene testing is relatively new tech compared to history,
also in romance, love and relationships, people usually just meet at a bar/cafe, talk, date and then consummate.. we dont live in the dystopian future of the movie 'galaga', where people go to labs to do compatibility checks, usually people base compatibility based on watching each other and making decisions based on if they share the same interests in food, music, politics, etc