External Link - Source: New York Times
It is an uncomfortable question that, in today’s world, is often asked by expectant mothers who had more than one male partner at the time they became pregnant. Who is the father? With more than half of births to women under 30 now out of wedlock, it is a question that may arise more often. Now blood tests are becoming available that can determine paternity as early as the eighth or ninth week of pregnancy, without an invasive procedure that could cause a miscarriage.