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A member asked:
What's the size difference between 14 week and 18 week fetus?
A doctor has provided 1 answer
About double: At 14 weeks a fetus is about 3.5" from head to butt, and around 5.5" at 18 weeks, almost twice as long. We don't measure head to toe since they are rarely stretched out like that for more than a moment.
Answered 4/13/2013
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