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Old Oct 6th, 2010, 04:47 AM   1
Wobbles
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Guide: Pregnancy trimesters vary depending on country


Depending on where you live, trimesters may vary. If your country is not listed below, make a post in this thread and we'll update

First Trimester
US & Canada: Conception > 12 weeks
UK: Conception > 13 weeks


Second Trimester
US & Canada: 13 > 28 weeks
UK: 14 > 26 weeks


Third Trimester
US & Canada: 28 weeks > Birth
UK: 27 weeks > Birth


In the interests of website standards, BabyandBump.com starts pregnancy from the first missed period and splits 40 weeks of pregnancy into 3 equal sections:

First Trimester Forum: Conception > 13 weeks
Second Trimester Forum: 14 > 26 weeks
Third Trimester Forum: 27 weeks > Birth



 
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Old Dec 31st, 2010, 08:02 AM   2
MommyMika
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I was confused, so this helps a lot!!! Thanks for posting this!



 
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Old Jun 1st, 2011, 23:55 PM   3
myfirstone
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thanks for the post



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Old Apr 19th, 2012, 05:09 AM   4
Flip flop
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Oh now I understand, thanks Stir Crazy. That would make sense as I found out I have cousin in Canada who is 10 days behind me but already had her scan! She got to announce it before me even though I'm ahead...a bit annoying.



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Old May 14th, 2012, 02:17 AM   5
monkeys mum
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Australia is the same as the UK



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Old May 14th, 2012, 17:30 PM   6
amotherslove
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omg, this makes so much sense now.. my books all say 13 weeks.. but everyone here says it's 12. haha



 
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Old May 16th, 2012, 11:35 AM   7
LarLar
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Thankyou although i'm from the UK and have always been told 2nd trimester begins at 12weeks.



 
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Old Jun 4th, 2012, 02:15 AM   8
hapi2bhealthy
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Really? I was told by all my docs that first tri ends after 12 weeks in Australia. Unless that really means as of the day baby "turns" 13 weeks I am in second tri?

(baby measured 13 weeks when lying on her back anyway!)

So now I am past 12 weeks am I first tri or second tri...??



 
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Old Sep 23rd, 2012, 14:45 PM   9
littlesteph
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I'm pretty sure UK start the second tri at 13 weeks thats what my midwife tells me and all my apps.



 
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Old Jan 1st, 2013, 14:21 PM   10
MoodasMomma
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VERY interesting. thanks!



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