I won't argue this much because there are cultures that permits for pregnancy before marriage, while we have a larger percentage on those that only advise after marriage, but ideally, we should have this done in marriage after doing the normal traditions as required by each custom, this goes along with the blessing to abounds in the marriage and make it more fruitful for them both to enjoy ad they planned to live together forever.
I see no difference, provided the man would take
the girlhis bride to the alter after getting her pregnant then no problem. A good percent of married people got their spouse pregnant before Marriage. I've known of couples that wedded after a year of living together. Intercourse is a thing of consent, aside that it's an abuse. So, if both sides consent on having a baby before going for parental blessings, then that's what should make the union work. One person's disagreement to that can ruin the relationship.