1. What is pregnancy measurement? Pregnancy calculation refers to determining the expected date of delivery and fetal development by calculating the time and cycle of a woman\’s last menstrual period. At the same time, pregnancy calculation can also help women understand their ovulation period, so as to better grasp the timing of pregnancy. 2. How to calculate pregnancy? 1. Calculate the time of your last menstrual period: First, you need to know the time of your last menstrual period. This date usually refers to the first day when bleeding begins. 2. Determine your menstrual cycle: record your menstrual cycle over the past few months