Simulated pregnancy
A simulated pregnancy is a deliberate attempt to create the false impression of pregnancy.
It should not be confused with false pregnancy, where the woman believes that she is truly pregnant. On that note, women have the option of using artificially supplied hormones to cause their bodies to effectively experience a false pregnancy, which would appear to be the truest form of simulated pregnancy yet discovered.
Women who wish to experience pregnancy to look pregnant, generally for social or psychological purposes, have the option of body suits and the like to wear under their clothes.