Hello, I am 34 weeks pregnant right now with my son. I just found out through an ultrasound yesterday that the baby is measuring small- about 32 weeks. He is symmetrically all around measuring the 32 weeks, so its not like I am getting all different measurments. But, should I be worried? What does this mean, to measure 2 weeks behind? Is it a problem with the placenta? He is VERY active, and has a great normal heartbeat and is doing great in every other way. My daughter was born at 36 weeks at 5lbs 5oz. Could I just have small babies? I weighed 118 pre pregnant and am now 138, so I put on 20 lbs. I just want everything to be OK and am not sure why he is measuring this 2 weeks behind. The DR did not seem concerned, but I go in again for a growth scan in 3 weeks. I also have a cerclage that is due to be taken out in 2 weeks! HELP! What do you guys think about all this?

Ultrasounds in late pregnancy aren't quite as accurate as they are in early pregnancy. There is approximately a one week window either way.

Remember that pregnancy is always a guessing game. I always advise my patients that they could be two weeks further along or two weeks earlier than the given due date.

The later ultrasound is basically to make sure that all organs are formed correctly, that kidneys are working properly, etc. Rarely do we change our due date from a third trimester ultrasound.

OK its like my cycle came on two times in one month andi was just wondering if I was pregnant or is it that Feb. was a short month