Well pregnancy is based on a 40 week scale. So if you divide 40 by three you come up with 13 weeks and 2 days (with a remainder of 1) So 1-13 weeks is 1st, 13-27 is 2nd, 27-40 is 3rd.
2007-02-26 02:48:14
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answer #1
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answered by momofthreemiracles 5
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Pregnancy is typically divided into three 3-month periods, or trimesters . The first trimester is from week 1 to 12, the second between weeks 13 and 24, and the third from week 25 until birth .
2007-02-26 02:35:24
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answer #2
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answered by redpeach_mi 7
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I was told 27. When I went in to see my doctor last week she said "You will start your third trimester on Thursday." I am 27 weeks and will be 28 weeks this Thursday so I think 27.
2007-02-26 02:34:02
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answer #3
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answered by Mrs. Always Right 5
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I have a piece of paper from my doctor that breaks down the weeks and it says that 26 weeks starts the third trimester.
2007-02-26 02:38:20
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answer #4
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answered by lindsey4706 3
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you are always going to get different answers on here, your best bet would be to ask your OB.
trimesters go in weeks of thirteen 1-13 is the first 14-26 is the second 27-labor is the third
that is what my OB told me anyway.
2007-02-26 02:34:09
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answer #5
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answered by puppy love 6
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Doesn't matter how many times you ask this question, you are still going to get different answers. Just like if you ask does the second start at 13 or 14. Just go with what your doctor says.
2007-02-26 02:36:09
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answer #6
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answered by I love sushi 4
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3rd Trimester is weeks 27 - 39 (Thirteen weeks just like the first two).
2007-02-26 02:34:50
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answer #7
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answered by Rwebgirl 6
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The 27th week is the last week of your 2nd trimester. The 28th week starts you 3rd
2007-02-26 02:39:33
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answer #8
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answered by Kimberly L 2
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what I see is weeks 27-42 is 4rd trimester
2007-02-26 02:34:37
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answer #9
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answered by Tracy 4
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its starts you 7th month...28 weeks.
2007-02-26 02:34:05
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answer #10
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answered by estkijedsco 4
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