How accurate is the edd calculator?

Hi Mummies, may I know how accurate is the edd calculator based on the first day or your last period? Am trying to avoid certain date. Thanks

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Edd based on LMP is just an rough guide. The baby growth will affect the EDD as well as the months goes by.

Quite accurate. If I remembered correctly, 1st day of your last period.

5mo ago

u go for scan. doc will tell u edd. based on ur baby size.