[Effects derived from occupational exposure to hazardous substances in pregnant working women: systematic review].

Objective: To review the effects derived from occupational exposure on pregnant working women exposed to hazardous substances.

Methods: Critical analysis of the works retrieved by systematic review in MEDLINE (PubMed), EMBASE, Cochrane Library, Scopus, Web of Science, LILACS and MEDES, up to January 2021. The Search Equation was developed by means of the descriptors «Pregnancy», «Hazardous Substances» and «Occupational Exposure», as well as using related Entry Terms and the filters «Humans» and «Adult: 19+ years».