Does being hypothyroid affect baby's growth? If so, you may get extra scans. I am not sure, and different countries do different things. My friend in the UK is hypothyroid and has been for ages, so they have been taking her blood regularly, and upping her dose when required, but she doesn't think she will get any more scans now, unless there is a problem. She is at the same stage in pregnancy as me. I am happy to get more scans, they will occur at approximately 30, 34 and 38 weeks, but judging by my rapidly growing belly, this baby is growing just fine