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Baby's Week-by-Week Development

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Becoming Pregnant (How it all happens)

 

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The '40-Week' Method

See also : The Count-Back Method 

and the 40-Week Method

 

also, try out the Weight Gain Calculator

 

 

This calculator will provide a week-by-week display of your pregnancy from the first day of the last menstrual period to the 40 week mark.  This calculator does not allow for varying ovulation times, but is the most common method used in the early days of pregnancy.  To see a more detailed analysis, use the 266-Day Calculator.

 

 

Step 1.  Enter the date of the first day of the last menstruation period:

 

                  

 

        This date is on a

 

 

Step 2.              

 

The calculation results are shown in the table below:

 

First day of last Menstruation Period

Week 1

Week 2 - Conception date on 28 day cycle

Week 3 (Week 1 after conception)

Week 4 (Week 2 after conception)

Week 5 (Week 3 after conception)

Week 6 (Week 4 after conception)

Week 7 (Week 5 after conception)

Week 8 (Week 6 after conception)

Week 9 (Week 7 after conception)

Week 10 (Week 8 after conception)

Week 11 (Week 9 after conception)

Week 12 (Week 10 after conception)

Week 13 - Moving into second trimester

Week 14 (Week 12 after conception)

Week 15 (Week 13 after conception)

Week 16 (Week 14 after conception)

Week 17 (Week 15 after conception)

Week 18 (Week 16 after conception)

Week 19 (Week 17 after conception)

Week 20 (Week 18 after conception)

Week 21 (Week 19 after conception)

Week 22 (Week 20 after conception)

Week 23 (Week 21 after conception)

Week 24 (Week 22 after conception)

Week 25 (Week 23 after conception)

Week 26 (Week 24 after conception)

Week 27 - Moving into third trimester

Week 28 (Week 26 after conception)

Week 29 (Week 27 after conception)

Week 30 (Week 28 after conception)

Week 31 (Week 29 after conception)

Week 32 (Week 30 after conception)

Week 33 (Week 31 after conception)

Week 34 (Week 32 after conception)

Week 35 (Week 33 after conception)

Week 36 (Week 34 after conception)

Week 37 (Week 35 after conception)

Week 38 (Week 36 after conception)

Week 39 (Week 37 after conception)

Week 40 - Estimated birth date

 

Your baby's astrological star-sign is

 

To see how we calculated the star sign click here.

 

 

 

 

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All information provided on this web site is for the purpose of education, information & discussion only and is not a replacement or substitute for consultations with your medical practitioner.  If you have ANY concerns about your health, please see your doctor immediately and do not rely solely on information found here or anywhere else on the internet.