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Old 04-11-2010
panam04's Avatar
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ObGyn Calculation of Due Date?

What would be the formula to calculate the date if the pregnant woman used to have 34 days cycles!?
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Old 04-12-2010
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Default Use the Naegele's Rule

The Naegele's rule is based on a regular 28 days cycle and it estimates the EDD as follows; LMP - 3Months + 7 days.

Since your patient is have 34 days cycle then you have to add the extra days 34-28= 6 days. So the formula will be
LMP - 3 Months + 13 days.

Always remember that the luteal phase is always 14 days.
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