Fetus #2 stained with 3.75% B-Lugol. Mid sagittal section of fetus #2 (15 + 2 weeks of gestation (weeks + days), total length = 15 cm, weight = 58 g). It was stained for 150 h in 3.75% B-Lugol, image analysis shows hardly any shrinkage reflected by the almost no space around the organs, as compared to the fetus shown in Fig. 1 which was stained in Lugol. B = Brain, H = Heart, Li = Liver. Scale bar represents 5 mm.