1. Fraternal twins make up 75% of the twinning population (with boy/girl twins being the highest percentage) Partly b/c fertility drugs (and increasing usage) stimulates ovulation of more than one egg.
2. Fraternal twins most of the time look just like any other 2 siblings in the same family (in odd cases can look more identical than IDENTICAL twins... example: Mary Kate and Ashley Olsen are fraternal twins)
3. The youngest reported twins to survive outside the womb were 21 weeks and 6 days! (9 days from now for me)
4. Twins now occur 1 out of 90 births.
5. A mother of fraternal twins has a 50% increased chance of having twins again in next pregnancy. (yikes)
6. African Americans have the highest percentage of fraternal twins, while asians have the lowest percentage.
7. Most women conceive fraternal twins after the age of 35!
8. Daughters of a mother who had franternal twins have 3-4 times more chance of conceiving twins (due to the hyperovulation gene).
9. If a husband is a twin or has twins on his side of the family, it has NO effect on a woman conceiving twins.
10. The average week most women deliver is 35 weeks, while full term for twins is 37 weeks.
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