Hi, I'm 24 weeks pregnant with twins. At my 20 weeks scan (was actually 21 wks) all was ok. A scan 2 weeks later showed a slightly lower than expected abdominal measurement for twin 2 so they asked me to come back a week later (24 weeks). This scan showed blood flow to twin 2 was within the normal range but on the low side so I've to go back in 3 days so they can keep an eye on it. She said best case scenario is it will have improved and the absolute worst case would they would need to deliver the twins early. I'm obviously extremely worried. Has anyone else experienced this? Is there anything I should be doing to help improve this? Twin 1 is fine at this stage.