<prompt> Which of the following is not true about expected date of delivery EDD?Less than 5 deliver on the expected date of delivery50 deliver within one week80 deliver within two weeksStandard deviation around EDD is 3 weeks  <response>: Ans. d. Standard deviation around EDD is 3 weeks Ref Duttas Jaypee 73Expected Date of Delivery EDDOnly 4 of births take place on EDDAbout 50 deliver within 1 week on either side of EDD80 deliver about 2 weeks before to 1 week after EDDStandard deviation is of 13 days90 of babies will be born within three weeks of their EDD. and 21 will be born within three days of it 