The nine months of pregnancy are divided into three trimesters
First: 14 weeks from the 1st day of last period
Baby: from egg to 3 " long, fully developed body, arms, legs, nails, ears
Second: 14-28 weeks
Baby: grows to 11" and 1 1/2 lbs. fingerprints, eyebrows and eyelashes form; 16 weeks sensitive to light; 24 weeks hearing develops; 29 weeks opens eyes and looks to light source.
Third: 28-40 weeks
Baby: 14-16 " and 2 1/2 -3 lbs: at start; grows to 5-9 lbs. and 20" in length; 29 weeks lungs developed; 32 weeks brain development, eyes track movement, sleep patterns develop.
