Please use this link to access this publication. ABSTRACT OBJECTIVE: To evaluate whether cannabis use during pregnancy was associated with depressive symptoms and whether ongoing use beyond the first trimester and higher amounts of cannabis use were associated with increased depressive symptoms. METHODS: This was a secondary analysis of the nuMoM2b (Nulliparous Pregnancy Outcomes Study: Monitoring Mothers to Be) study with participants enrolled from October 2010 to September 2013 at eight academic centers. Individuals with pregnancy outcome data who completed the EPDS (Edinburgh Postnatal Depression Scale) in the first and third trimesters and had available frozen stored urine samples were included. Cannabis exposure was...