Okay ladies I need clarification

[ArmyPrincess819]

Now I'm having my 4th baby so you think I would know. My dr told me my 2nd trimester starts @ 14 wks but medhelp says 13 wks. Does anyone for sure know when it begins. Please let me know!!!!

Hugs,
AP

[GRose]

darkest-I thought so too but in my weekly newsletters they say 14 weeks is the 2nd and I just checked in a couple of my books and they also say 14 weeks. So I guess I enter my second trimester tomorrow, not last week, oh well.

[Darkestlight]

i always thought the beginning of wk 13 was trimester 2

[ArmyPrincess819]

Thanks ladies you are the best...

Hugs,
Ap

[Tiger63]

On this website you can put in your dates and the calculator will tell you when your trimesters begin and end according to the three methods: Development,   Gestation and   Conception.

According to the development method i have begun my second trimester as of today.

Accodring to the Gestation method it doesn't begin until jan 23rd.

According to conception it doesn't start until !st feb.

Use this link to calculate your trimesters accroding to these methods:

http://www.baby2see.com/trimester_calculator.html

[Tiger63]

My dr told me at 12 weeks i could say i was out of the first trimester. I suppose it depends on who you talk to. I recently read this website and found this info:

http://www.baby2see.com/trimester_calculator.html

The three basic ways to calculate trimesters  
There are basically three ways of dividing up a pregnancy into the three trimesters; they are by:
Development,   Gestation,   Conception. They give different dates for when the second trimester begins and for when the third trimester begins. Your health care provider might prefer to use the Development method, while another Midwife or Doctor may use the Gestation method.
I am sure they do that just to confuse pregnant women.  
Development:
This uses actual developmental stages to divide up a pregnancy. From LMP to 12 weeks the embryo develops all the major organs and becomes a fetus. From 12 weeks to 27 weeks the fetus continues developing and reaches viability. From 27 weeks on the fetus finishes development and prepares for delivery. Here the second trimester begins at 12w 0d and the third at 27w 0d.
Gestation:
With this method you take the 40 weeks of gestation and divide by three. Here the second trimester begins at 13w 3d and the third at 26w 6d.
Conception:
This method is where you take the 38 weeks of post conception development, divide by three, and add two weeks. Here the second trimester begins at 14w 5d and the third at 27w 3d.


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No matter what method is used; a pregnancy has a beginning, middle and end. You can use the trimester dates from your Doctor, a book or a website, whichever you feel most comfortable with.
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What is the length of the first, second and third trimesters?
The length of the trimesters is often a source of confusion. The word trimester means 'three months'. Three periods of three months each, gives pregnancy a beginning, a middle and an end period.

These periods match the developmental stages to divide up a pregnancy. From LMP to 12 weeks the embryo develops all the major organs, becomes a fetus, and the placenta takes over control. From 12 weeks to 27 weeks the fetus continues developing and reaches viability. From 27 weeks on the fetus finishes development and prepares for delivery.

[GRose]

I don't know why this is such a hard thing to figure out but it is, everywhere I look I find a different answer.
Hopefully someone can give a definitive answer.