We had our 21 week anatomy scan yesterday (2nd one) and they saw a cyst on babies brain. She said as long as it's not accompanied by other factors (missing or deformities) it's nothing to worry about and usually goes away on its own. Anybody else have this happen to them? The baby is also only at 6% percentile for his size and "should be in 10-90%" so we are going back to monitor both. He's growing, just behind a week or so. Curious if anyone has had similar experiences.