Table 1. Details of the databases and the search strings used.

Databases searched	Keywords used
PubMed (https://pubmed.ncbi.nlm.nih.gov)	(“microplastics") AND ("pregnancy" OR "fetal growth" OR "fetal outcome")
Embase (https://www.embase.com)	(“microplastics") AND ("pregnancy" OR "fetal growth" OR "fetal outcome")
Science Direct (https://www.sciencedirect.com/search)	(“microplastics") AND ("pregnancy" OR "fetal growth" OR "fetal outcome")
Web of Science (http://apps.webofknowledge.com/WOS)	(“microplastics") AND ("pregnancy" OR "fetal growth" OR "fetal outcome")
Scopus (https://www.elsevier.com/en-in/products/scopus/search)	(“microplastics") AND ("pregnancy" OR "fetal growth" OR "fetal outcome")
Google Scholar (https://scholar.google.com/)	(“microplastics") AND ("pregnancy" OR "fetal growth" OR "fetal outcome")