Full term gestation of a fetus ranges from 38 to 42 weeks. Doctors primarily suggest 40 weeks in the EDD (estimated date of delivery), but a woman, especially first time mothers, can go into labor two weeks early or two weeks late of her EDD. However, if a woman appears that she will not go into labor after more than 42 weeks, or if the baby is already getting too large earlier than 40 weeks, the doctor will induce labor. That is the number they shoot for.
In any case, the best way to confirm paternity is a DNA test post-partum.
You do a DNA test...
It depends on how you answered the paternity suit. If you are not the parent and it is proved that you are not the father, nothing more needs done. If you are the parent, many more court dates could come to determine custody and child support.
You can not tell paternity by blood type. You can rule out paternity by blood type. For example, if both parents are O negative and the baby is type A positive, you can rule out paternity. The only way to determine paternity is by a DNA test. A few of the baby's hairs and the father's hairs can be sent to a lab. The lab can determine paternity.
A paternity test can determine if there is a parent-child relationship between two people. A paternity test would give genetic proof of that relationship.
DNA test with a swab in your mouth.
A child inherits factors or genes from each parent that determine his or her blood type. This fact makes blood typing useful in paternity testing. The blood types of the child, mother, and alleged father are compared to determine paternity.
Through one of several types of tests-the most common being blood or saliva tests. Paternity tests can also be court ordered if part of a paternity suit.
Paternity Test - 2010 was released on: USA: December 2010
Contained within the blood are the genetic DNA "markers". They can be multiplied by PCR in hours and compared against the baseline to determine paternity. DNA is used as it has greater stability than RNA, both can be derived and determined by viable blood cells to determine paternity.