I would need much more data on this, such as the following:

1. Are they full term or premature?
2.Are the babies ill or well?
3. Did the mothers get prenatal care?
4. How old are the mothers?
5. Did the mothers or fathers have health issues?
6. What type of diet was the mother on?
7. How old are the fathers? (This fact has been found to be very important).
8. Did the mother and/or father live near factories?
9. What type of occupation did the mother and father have? Ex: Someone's hubby working in a coal mine or a chemical plant would be important.
10.Did the mother or father smoke, drink alcohol, and/or do illegal drugs?
11.What is the education level of the parents?
12.What was the mothers feelings towards her pregnancy?
13.What was the race of the parents? For some, this may be normal.
14. Did the mother contract any viruses during the pregnancy?
15. Was this a multiple birth?
16. Did the mother have morning sickness throughout the pregnancy?

It's very interesting, but I feel a bit left out with information as you can see.

__________________