Hcg and twins?

Jess

Hey ladies— I know the only way to truly tell if you’re having twins is by sono- but was just curious if anyone had this experience. My hcg quantitative was 21 on 11/4, two days later on 11/6 it was 115 and then 3 days later on 11/9 it is 495. Has anyone had their quant quadruple every 2 days instead of just double and then found out they were having twins?