is there a growth spurt between 20 and 21 weeks!

[DuelingFanjo]

I was just reading on line that at 20 weeks my baby will measure about 16.5 cm but by 21 weeks it will be a wopping 27 cm! then the growth seems to slow again in the following weeks!

Is this true?

How the measurement is done changes at this stage:

"Up until now he has been measured from crown to rump but from this point on the measurement will be from crown to heel ? and this week he is about 27cm long."

www.babycentre.co.uk/pregnancy/fetaldevelopment/21weeks/

At some point in pregnancy they switch from defining the baby's length in terms of the measurement from crown to rump to measuring crown to foot. I can't remember off hand whether this is generally at 21 weeks, but I think it's roughly then. That would explain the massive 10 cm increase! Why they do this - I have no idea.....

Ah right! DOH!