I'm 26 weeks pregnant i did a ultrasound and my baby's brain size was 11 mm and the normal size is 10 mm , when i did bi-test , the test said that everything will be normal and the baby is at low risk to have any brain syndrome , but now i'm stressed and scared about tha 11 mm size that we saw in ultrasound i don't know , doctor says that it's not a problem but its my first baby and i want the best for her.can anyone tell me they experience or somthing cuz i'm so stressed