Right now in your pg, they measure the baby and that gives the "general" age of the baby. All through your pregancy they will be "measuring" you at each appointment on the outside. The number of centimeters is suposed to corrispond to the number of weeks pg you are. I always measured 3 weeks ahead and I knew the exact day I conceived so we knew the due date was right!

What I'm trying to say is that it all depends on how fast the baby is growing. Some weeks they will shoot up fast and others they don't. Also, each baby is differant. Your dr is going by the measurment he took to give an approximate age of the baby. Try not to worry, which I know if hard. If there was a problem, the dr would have said something.

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