A pregnancy table, also known as a gestational age chart, is a tool used to determine the stage of pregnancy based on the number of weeks since the first day of the last menstrual period. Other synonyms for pregnancy table include gestational age calculator and fetal growth chart. These charts are used by healthcare professionals to accurately monitor pregnancy and track fetal development. They provide information about fetal size, weight, and various other important measurements. There are many variations of these charts, including ones based on ultrasound measurements, but the basic concept remains the same; to provide accurate information about gestational age and fetal development.