Boo now measures about 16.5 centimetres from crown to rump and is steadily gaining weight (just like his mum!). A whitish coat of a slick, fatty substance called vernix caseosa is beginning to cover him and protects his skin during its long immersion in amniotic fluid. It also eases delivery (nice!). Boo's swallowing more this week, good practice for the digestive system. After he takes in amniotic fluid, his body absorbs the water in the liquid and moves the rest into the large bowel.
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