Why is drinking, smoking, and drugs while pregnant so discouraged but abortion is so accepted?

Well most abortions legally happen within 10-12 weeks. A woman isn't typically showing until around 13 or 14 weeks if not later. I suppose at the point you would see a woman drinking or smoking and know for a fact she is pregnant it is likely she is beyond the point of legally having an abortion. At that point she is just fucking the kid up with what she is putting into her body.