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Age of the fetus by ultrasound - Online Doctor Chats

Date : 13-Jan-2012
User rating for this question
Very Good Posted in: Pregnancy
Answered by

General & Family Physician
Practicing since : 2009
Answered : 594 Questions

Doctor :   hello
Doctor :  
how can i help u?
User :   I measured 13cm at my ultrasound on sept 4 how far along was i?
User :   i was told i was 13 weeks but eveything i have read says i should have been 17 weeks
Doctor :  
what did u read?
User :   at 17 weeks pregnant the baby measures 13 cm crown to rump.
Doctor :  
r u there?
User :   yes
Doctor :  
Doctor :   u do repeat scan this month 4th
Doctor :  
this will give u a better idea
User :   i have a scheduled ultrasound next week but i still have no idea how far along i am
Doctor :  
when did u miss a period?
User :   back in july.
User :   i took a test on the 9th of july it was positive
Doctor :  
Doctor :  
actually rather than crl biparietal diameter is a very good indicator of the age of the fetus

Doctor :  
crl of 13cm corresponds to somewhere around 10 to 13 weeks of pregnancy not 17weeeks
Doctor :  
r u there?
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