He lies tightly curled up in the womb, cushioned by the bag of waters that surrounds him, entirely reliant on your placenta for food and oxygen, and for the disposal of his waste products. However, he looks and behaves much the same as a baby at birth.
Sight and Hearing:
His eyelids are still sealed, but by week 28, they become unsealed, and he may see, and open and close his eyes. He can hear your voice, and if he’s asleep can be woken by loud music. He may prefer some types of music, and show this by his movements. He jumps at sudden noises.
He frowns, squints, purses his lips and opens and closes his mouth.
Life Support System:
The baby is nourished by the placenta and protected by warm amniotic fluid, which change every four hours. It regulates the baby’s temperature and protects against any infection and sudden bumps.
Movements and Sleeping patterns:
He kicks and punches, and sometimes turns somersaults. He can make a fist. He sleeps and wakes randomly, and will probably be most active when you are trying to sleep.
Sucking, Swallowing and Breathing:
He sucks his thumb, and swallows the warm water (the amniotic fluid) that surrounds him, passing it out of his body as urine. Sometimes he drinks too much of the fluid and then hiccups. He makes breathing movements with his chest, practicing for life outside the womb.
His taste buds are forming, and by week 28 he can respond to sweet, sour and bitter tastes.
The part of the brain concerned with personality and intelligence becomes far more complex over the seventh month, so his personality may soon be developing.
Your Growing baby:
No fat has been laid down yet, so the baby is still lean. Sweat glands are forming in the skin. Arm and leg muscles are well developed, and the baby tries them out regularly.
He has periods of frenzied activity, when you feel him moving around alternating with periods of calm. The baby can cough and hiccup; you may feel the hiccups as a knocking movement.