How accurate is baby's due date?
More or Less: Behind the Stats
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How to Calculate a Due Date for a Baby
Asma Khalil is a professor of obstetrics and maternal fetal medicine at San Julius Hospital in London. She talks us through the go-to most commonly used method for calculating a baby's due date. Dr Franz Nagela came up with his rule back in the early 19th century. It takes equation from last minisor period, adding seven days plus nine months. Also we now commonly use ultrasound early in pregnancy to calculate due date.
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