What are the chances of having twins your first pregnancy?

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My brothers girlfriend is 6 weeks pregnant. It’s her first pregnancy but she has a family history of twins. What are the chances of her having twins?

i have twin brothers and both just had kids with one girlfriend having twins run in her family they both came out with singletons!!
1 in 1,000,000
I had twins with my first and only pregnancy. No history of twins on either side of the family. I was told age was a factor for us having twins. After 35 your chances for multiples is very high.
Best wishes for the upcoming bundle of joy!! = )
I heard 32 in every 100 people have twins, my sister is pregnant with twins but through IVF which makes multiple pregnancies a lot more common.
I had twins and this was my first pregnancy to term!