Abbreviation: BWT = Birth Weight

a. Studies are sorted first by overall study confidence level then by Exposure Window examined. 

b. {Meng, 2018, 4829851@@author-year} pooled samples from umbilical cord blood and maternal plasma during the first and second trimesters. The remaining studies were all based on either one umbilical or maternal sample. 

c. The results displayed here for mean BWT among 587 overall population participants in the POPUP Cohort are from a larger population of participants {Swedish Environmental Protection Agency, 2017, 6937371} compared to a sample size of 381 in their 2018 publication {Gyllenhammar, 2018, 4238300@@author-year}.

d. {Xu, 2019, 5381338@@author-year} results are truncated for the 91.5 gram increase; the complete 95% CI ranges from -136.5 to 319.6 grams.