Week 29 - 30
March 17th, 2007 at 7:40 pm (Stages of Pregnancy)
Your baby now weighs about 1,350 grams (approximately 3 lbs) and measures about 40 cm in length (or 15.75 inches).
Your baby’s bones are now mature enough to start producing their own blood supply from their bone marrow, taking over this task from their liver and spleen. During the last 3 months unborn babies begin to store iron in their liver (supplied from their mother’s body). This is Nature’s way of meeting their iron requirements until they start eating solids, about 4 to 6 months after birth.
From week 30 your baby develops a special layer of fat called ‘brown adipose tissue’ (or BAT). This is similar to the kind of fat found in hibernating animals. BAT is your baby’s main source of heat production after birth, because newborn babies have a limited ability to shiver, sweat or move to regulate their own body temperature.
Your baby’s brain is increasing in size and complexity and the pupils of their eyes can now respond to light, allowing your baby to focus more readily and see dim shapes.