It's 15 inches long and weighs around 1-1.5 kg. The eyes can open and close now. The eye color had appeared but actually may changes especially the one with blue or gray eyes. It slept for 20-30 minutes at a time.
29th Week
The bones are developed completely but still soft and delicate. The movements are more powerful.
30th Week
Mom transfered nutrition through placenta to umbilical cord.
31st Week
The reproductive organ continues to develop (if boys, testicles move from kidney to scrotum through groin). Lungs also developed though not mature yet.
32nd Week
It sleeps 90-95% of a day. Sometimes fetus dreams because it experienced REM during sleeping.
33rd Week
Now it can detect light. It gains 0.75 kg in a week. Fetus can survive if born at this age though would need full attention.
36th Week
It's 16-19 inches tall and weighs 3-3.25 kgs.
39th Week
Mom's placenta provides antibody. It had enough fat to maintain body temperature.
40th Week
The weight is about 3.75 kgs. Placenta would separate from uterus and the umbilical cord stopped working when baby breathe air for the first time. The way the baby breathe will change the structure of heart and arteries which force all bloods to pass lungs.
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