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Discussion Starter · #1 ·
What would be the formula to calculate the date if the pregnant woman used to have 34 days cycles!?
 

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Discussion Starter · #2 ·
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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