Gestational age can be calculated using various methods, including: - LMP (Last Menstrual Period): The most common method, where the first day of the last menstrual period is used as the starting point. - Ultrasound: An early ultrasound scan can provide a more accurate gestational age, especially if the menstrual cycle is irregular. - Physical Examination: Measurement of the fundal height (distance from the pubic bone to the top of the uterus) can also estimate gestational age.
