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The impact of maternal lifestyle factors on periconception ..:

Oostingh, EC ; Hall, J ; Koster, MPH...
https://discovery.ucl.ac.uk/id/eprint/10062832/1/Hall_The%20impact%20of%20maternal%20lifestyle%20factors%20on%20periconception%20outcomes.%20A%20systematic%20review%20of%20observational%20studies_AAM.pdf.  , 2019