How to accurately calculate the gestational age. Pregnancy is something every woman dreams of, but during pregnancy, there are many things to consider, such as accurately calculating the gestational age and keeping abreast of the baby\’s development. So how to accurately calculate gestational age? The following is elaborated from four aspects. 1. Last menstrual period method (LMP method) The most common method to calculate gestational age is the last menstrual period method, which uses the first day of a woman’s last menstrual period to calculate gestational age. in L