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24 Weeks |
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Your baby is now about 26 centimetres long and weighs about 500 grammes or 1.1lbs. He’s rapidly bulking up now, with bone mass, muscle, organ growth and fat. His skin is wrinkled but will begin to smooth out over time as he develops more muscles and puts on fat. Permanent teeth buds are now appearing in your baby's gums. Brain waves are beginning to activate the auditory and visual systems, causing the baby’s mouth and lips to become sensitive. Eyes will respond to light and the ears are reactive to sounds from outside of the uterus. Your baby may be able to tell when they are upside down now because their inner ear is completely developed. The brain is very active now and is regulating all other body functions. Toenails and fingernails are growing now and may need trimmed when they are born. Blood vessels in the lungs are developing and will exchange oxygen after birth. The alveoli (the very tiny final branches of the respiratory tree) and air sacs have developed completely.
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