Authors  Healthy controls First trimester Second trimester Third trimester Statistics (P) Kundu et al.[70]* - 151 151 151 NS Sekine et al.[68]* 123.0±12.1 140.2±12.4 135.8±7.5 143.3±6.1 NS Butler andWhanger[71]¶ - 0.14±0.03 0.17±0.02a 0.18±0.02a <0.0001 Swanson et al. [33]* 126 118 - 116 NS Nwagha et al.[74]* 109.0±14.2 107.4±15.8 82.9±17.4a 79.7±18.9a <0.0001 vs.ctrand 1st trim

Table 2: Selenium concentration in plasma/serum in women during pregnancy with relatively high baseline selenium level. The primary data from Kundu et al. [70] could not be obtained; interpretation of the results about concentration of Se level is based on a graph in the publication. aStatistical values were calculated only in the group of pregnant women without the group of non-pregnant women.