Hi.. I'm on my first pregnancy and I learned we are having modi twins. We are soooo happy but nervous at the same time. So I have some questions - are modi twins always identical? How long would i feel the twins' movements? at 12 weeks, twin A is 16 gms and twin B is 12 gms.. Are the weights within the normal range? Are there any ways to prevent ttts? Any input would be appreciated! Thank u so much!!