Yes, my DD always measured small but not small enough for them to take action- at one point my fluid was low but went back up, and another point her body was measuring behind her head but then it balanced out. She was small at birth but was also early. She is STILL small with a big head (3% weight, 60% for head) at almost 2 years but perfectly healthy, so I guess that's just the way she's built!
My current LO appears to be small, too, as my fundal height is 4 weeks behind so I am scheduled for a growth U/S next week. Depending on how growth changes/slows, many doctors will opt to induce early if they think LO is not getting enough nutrition in the womb.