Close-up of 4-D scan of the near full term foetus drinking the amniotic fluid.This helps prepare the digestive tract for life outside the womb.

• 从4-D扫描图的特写镜头可以看到，这个差不多足月的胎儿在吸食羊水。这有助于胎儿为迎接子宫外的生活锻炼消化系统。