I'm wondering if anyone else has had this come up... Twins run in my family (my mom is one of 3 sets just from her brothers and sisters!) and she didn't have twins. Twins also run rampant on my husband's side. I've heard that twins are hereditary (my Obgyn even brought this up) and am curious what the likelihood is for getting an ultrasound done early on in the pregnancy. I'm not even really sure how soon most women are able to find this out. I'm meeting with my Dr on Monday but wanted to ask you all.