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Lina
My angel is finally here
Member since 5/10 2559 total posts
Name:
Lindsay
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Dumb question about pregnancy length
Ok, I am probably going to kick myself for asking this b/c I am probably making myself look very dumb but here goes. Can someone please explain to me why they say pregnancy lasts 9 months when really it's 10 
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Posted 2/3/12 11:06 AM  |
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Eireann
Two ladies and a gentleman!
Member since 5/05 12165 total posts
Name:
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Re: Dumb question about pregnancy length
Haha...and see, I can't see why anyone (ETA...and I don't mean you...a lot of people say this) thinks it's 10 months when it's really 9. Take my last pregnancy for example...
LMP: 1/25 (and I got pregnant actually in February)
Birth: 10/26
That's nine months in my book. There is no other realm where that is considered 10 months. 
Message edited 2/3/2012 11:13:22 AM.
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| Posted 2/3/12 11:10 AM |
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headoverheels
s'il vous plaît
Member since 6/07 42079 total posts
Name:
LB
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Re: Dumb question about pregnancy length
Posted by Eireann
Haha...and see, I can't see why anyone (ETA...and I don't mean you...a lot of people say this) thinks it's 10 months when it's really 9. Take my last pregnancy for example...
LMP: 1/25 (and I got pregnant actually in February)
Birth: 10/26
That's nine months in my book. There is no other realm where that is considered 10 months.
Same here 
I think some people say 10 months because they think 40 weeks @ 4 weeks per month = 10 months, but that's obviously not true since Feb is the only month with only 4 weeks. All other months are 4 weeks and 2 or 3 days.
Pregnancy is 9 months long 
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| Posted 2/3/12 11:18 AM |
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july4mrsO
Happy boy!
Member since 5/10 2867 total posts
Name:
Jess
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Re: Dumb question about pregnancy length
You know, I realize what people do. 40 weeks divided by 4 weeks per month = 10 months. But only February is 4 weeks, every other month is 4 weeks and change. Otherwise we'd have 13 months in a year instead of 12. So it's 40 weeks but it's 9 months.
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| Posted 2/3/12 11:18 AM |
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Lina
My angel is finally here
Member since 5/10 2559 total posts
Name:
Lindsay
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Re: Dumb question about pregnancy length
I just consider there to be (on average) 4 weeks in a month and at 40 weeks... that is 10 months. Even this pregnancy calendar shows 10 months... link
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| Posted 2/3/12 11:20 AM |
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anewday
<3
Member since 9/08 1493 total posts
Name:
Dawn
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Re: Dumb question about pregnancy length
at the end of 40 weeks you've completed the 9th month so for many its closer to 10 months...
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| Posted 2/3/12 11:20 AM |
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headoverheels
s'il vous plaît
Member since 6/07 42079 total posts
Name:
LB
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Re: Dumb question about pregnancy length
Posted by Lina
I just consider there to be (on average) 4 weeks in a month and at 40 weeks... that is 10 months. Even this pregnancy calendar shows 10 months... link
Except, it's not. On average, a month is 4 weeks and 2.5 days.
NO month except Feb is 4 weeks. Ever. Not even on average
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| Posted 2/3/12 11:44 AM |
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Lina
My angel is finally here
Member since 5/10 2559 total posts
Name:
Lindsay
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Re: Dumb question about pregnancy length
Posted by headoverheels
Posted by Lina
I just consider there to be (on average) 4 weeks in a month and at 40 weeks... that is 10 months. Even this pregnancy calendar shows 10 months... link
Except, it's not. On average, a month is 4 weeks and 2.5 days.
NO month except Feb is 4 weeks. Ever. Not even on average
Got that part. But if someone said to me, how many weeks are in a month- to round off I would say 4, not 5. I get the math behind it, I guess I just figured it's closer to 10 than 9. Thanks for the info ladies.
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| Posted 2/3/12 11:53 AM |
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shiv
Twinsanity!!
Member since 5/07 4747 total posts
Name:
Shiv
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Re: Dumb question about pregnancy length
I always think of it as 9 months- 9 CALENDAR months. So if my last period was Jan 1st, I would be 3 months pregnant on April 1st, even though I would be 13 weeks. It makes more sense when you think of it in terms of calendar months.
Same thing with trimesters- every 3 calendar months is a new trimester.
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| Posted 2/3/12 12:45 PM |
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CheSaraSara
LIF Infant
Member since 9/11 269 total posts
Name:
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Re: Dumb question about pregnancy length
this was the exact thought in my head as i tossed & turned last night!
I was trying to rationalize & figure it out.
(And i have to say im with you on the 10 month thing..)
This is what ive come up with... first 4 weeks are sort of a wash...AF, BD, 2WW (then BFP). So that leaves 36 weeks (9 months)...lol
But my ultimate stupid question...
how do you count months?
I'm 10 weeks...so is that 2 1/2 months? If so, that means that when my DD Aug 30th comes around at 40 weeks I'm 10 months....
 Oh I wish I got more sleep last night.
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| Posted 2/3/12 1:36 PM |
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Googlybear
i got a mama's boy!!
Member since 10/11 1132 total posts
Name:
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Re: Dumb question about pregnancy length
the thing is you have completed 9 months to your 40 week mark- if you go into 41 or 42 weeks, then it is 10 months. Supposedly it is based on a lunar month, not a calendar month- so weird..
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| Posted 2/3/12 4:58 PM |
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PsychedPsycho
LIF Infant
Member since 4/10 303 total posts
Name:
Rosella EDD 8.31.12
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Re: Dumb question about pregnancy length
it is 9 complete months when you hit the 40 week mark. When you pass the 40w mark, you are considered 'in the 10th month' so thats where you get confused. I went 6 days past my edd and told people i was 10m preg 6 day truly seems like a full month when you have a 9 lb baby in you!
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| Posted 2/4/12 3:59 PM |
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Teach723
Have faith. Believe. Dream.
Member since 8/10 2356 total posts
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Re: Dumb question about pregnancy length
Because OBs go by lunar months which is every 4 weeks. My preg app does this. At 32 weeks it says 8 months.
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| Posted 2/4/12 4:19 PM |
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