A belly cast is a popular way to capture the shape and size of a pregnant belly. However, there are various synonyms for this term that you may not be aware of. One such synonym is a "pregnancy mold," which uses plaster or other materials to create a three-dimensional impression of the expectant mother's belly. Another synonym is a "maternity sculpture," which involves taking a casting material and molding it into a unique shape that represents the pregnant belly. Other terms used for belly cast include "pregnancy statue," "maternity cast," and "pregnancy sculpture," all of which refer to the same process of creating a tangible keepsake of a woman's pregnancy.