50/50 if the gene runs in your family
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1 out of 365 These odds improve if she has sex and gets pregnant about 3 months after her birthday.
The odds of a woman having twins on new years even where on baby is born in the final minutes of the year and the other born in the beginning minutes of the next year is considered a rarity and only a handful of cases are reported each year.
The fact that twins run in families is actually a myth. The odds of twins having twins is the same as a non-twin having twins. That is about 1 in 33.
For each pregnancy, there is a 50 percent chance of a boy and a 50 percent chance of a girl baby. So to answer your question the odds are still 50:50.
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