Pregnancy-associated plasma protein-A (PAPP-A) is a protein that is produced by the placenta during pregnancy. PAPP-A is important because it helps to regulate the growth and development of the fetus. However, there are synonyms for this protein that are used in the scientific and medical communities. Some of the common synonyms for PAPP-A include: insulin-like growth factor-binding protein-4 protease, pregnancy zone protein, and eukaryotic translation initiation factor 4 gamma-binding protein 1. These synonyms are used to describe the same protein and are used interchangeably in scientific research and medical publications. Understanding the various synonyms for PAPP-A can help medical professionals and researchers communicate more effectively and efficiently about this important protein.