<prompt> According to Naegeles rule, calculate EDD of a patient with LMP 912017:1610201716092017161120179102017  <response>: ANS. A Adding 7 days 9 months to LMP gives EDD Naegeles rule is based on 28 days regular cycle If the cycle is shorter or longer than 28 days, EDD will be corrected and written as corrected EDD.For irregular cycles:1. If she is having 40 days cycle regularly, to get corrected EDD, add 40-28 with the EDD calculated from LMP.2. If she is having 21 days cycle regularly, to get corrected EDD, substract 28-21 7 with the EDD calculated from LMP. 