Twins run in my family. This is my second pregnancy and I don't want to have twins lol. I have a twin brother , my mom is a twin and so is my moms mom. They're are also other sets of twins in the family. Would my hcg levels be doubled if I was having twins? Anyone know lol? I'll be 7 weeks Thursday. Got my blood test done last Friday and I was 6 weeks 1 day and my levels were 12076.