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How Many Weeks is the 1st Trimester?
0-13 weeks & 6 days
How Many Weeks is the 2nd Trimester?
14 to 27 weeks & 6 days
How Many Weeks is the 3rd Trimester?
28-40 weeks & 6 days
Naegele’s Rule & EDB
Calculates EDB
Minus 3 months
Plus 7 days
& + 1 year (if applicable)
Consider 30 days = 1 month