How accurate is your Due Date - Transition to Parenthood

How accurate is your Due Date - Transition to Parenthood

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日期:2026-04-20
How accurate is your Due Date? How are due dates calculated? The standard calculation is called Nägele’s Rule. This was developed in the 1850’s by a Dr. Nägele, who determined that the average human pregnancy was 266 days from conception, or 280 days (40 ...看更多