20% size rule

Allyson

Hi! I'm 21 weeks 1 day and had my anatomy scan today. My doctor said with twins, you dont want there to be more than a 20% size difference between babies. My Baby A is at 1lb 1 ounce and my Baby B is at 14 ounces. Is anyone experiencing any problems with one baby being larger than the other? What was done? Thanks!