Fig. 1From: Sleep, light exposure at night, and psychological wellbeing during pregnancyLux Level at 2nd and 3rd Trimesters (n = 115). Paired samples t-test showed a significant difference in lux level (4 am to < 7 am) from the 2nd to 3rd trimester (Cohen’s d = 0.32, p = 0.005)Back to article page