Molar pregnancy in the last 50 years: A bibliometric analysis of global research output

Molar pregnancy is a gestational trophoblastic disease characterized by an abnormal growth of placental tissues because of a nonviable pregnancy. The understanding of the pathophysiology and management of molar pregnancy has significantly increased in the recent years. This study aims to determine the characteristics and trends of published articles in the field of molar pregnancy through a bibliometric analysis. Using the Scopus database, we identified all original research articles on molar pregnancy from 1970 to 2020. Bibliographic and citation information were obtained, and visualization of collaboration networks of countries and keywords related to molar pregnancy was conducted using VOSviewer software. We obtained a total of 2009 relevant papers published between 1970 and 2020 from 80 different countries. The number of publications continued to increase through the years. However, the number of publications in molar pregnancy is still low compared to the other research fields in obstetrics and gynecology. The USA (n = 421, 32.1%), Japan (n = 199, 15.2%), and the UK (n = 191, 14.6%) contributed the greatest number of publications in this field. The top journals which contributed to the field of molar pregnancy include AJOG (n = 91), Obstetrics and Gynecology (n = 81), and the Gynecologic Oncology (n = 57). The most cited articles in molar pregnancy include papers on the genetics and chromosomal abnormalities in molar pregnancies. The focus of current research in this field was on elucidating the molecular mechanism of hydatidiform moles. Our bibliometric analysis showed the global research landscape, trends and development, scientific impact, and collaboration among researchers in the field of molar pregnancy.