Abstract: A method and apparatus for determining and displaying fetal development data during pregnancy which allows a user to instantly view the current status of fetal development based on user defined pregnancy reference data. Pregnancy reference data, including a pregnancy reference date such as the expected due date, is entered by the user and stored in a storage device. Thereafter, whenever the user requests the information concerning the fetus, the apparatus estimates the current status of fetal development using the pregnancy reference data and a look-up table containing various parameters. The apparatus then provides a convenient display of the current status of fetal development. The display may be in the form of current gestation measurements or expected current fetal measurements, such as the expected size and weight of the fetus.