BACKGROUND: United States (US) federal research policy changed in the early 1990's to include more pregnant patients in clinical research. However, pregnancy outcomes in the US have experienced a gradual decline over recent decades. Little research has been done to characterize US obstetric pharmacy publications and compare them to global trends during this time. OBJECTIVES: The purpose of this study was to measure the volume and types of US and non-US obstetric pharmacy literature over 30 years to characterize research in this specialty. Secondary objectives included measuring trends in authorship and citations in addition to performing a text mining analysis of obstetric pharmacy publications. METHODS: This bibliometric analysis used the Web of Science database to identify obstetric pharmacy documents published between 1994 and 2023 in both the United States and non-US countries. Articles were included if they contained obstetric or pregnancy topics and were within the pharmacy and pharmacology research area. Data on document types, citations, authors, and common words were collected and analyzed using descriptive statistics. RESULTS: A total of 12,190 obstetric pharmacy documents met inclusion criteria, representing only 2.8% of worldwide obstetric publications. The US had the most (29.6%) included documents, followed by China (10.7%), Italy (5%), the United Kingdom (3.2%), and Canada (3.2%). US and non-US documents increased exponentially (R CONCLUSION: Pharmacy documents represent a very small proportion of obstetric publications amidst worsening maternal outcomes in the US. Despite exponential growth in obstetric publication frequency, the overall contribution from the US is at recent risk of being superseded by China. High international collaboration and citations of US documents may provide opportunities to increase future scientific production in this area and improve patient outcomes.