Week # 25 the baby is about 13.5 inches long and weighs about 1 to 1 and 1/4 pounds. It has hiccups (caused by when the baby practices breathing as they inhale and exhale and swallow fluid)
Week #26 the baby is 1.5 pounds and is 13.75 inches long. The development of fat stores help with regulation of temperature after the birth.
Week # 27 the baby weighs 2 pounds and is 14.25 inches long. The baby continues to practice sucking and can now open eyes and see light thru the mothers abdomen.
Week # 28 the baby is 2.4 pounds and is 15.25 inches long.
Week # 29 The baby is now 2.5 pounds and is 16 inches long. Eyelashes and eyebrows and the hair fully formed and continue to grow.
Week # 30 The baby is now 3 pounds and is 16.8 inches long.
Week # 31 the bays is now 3.5 pounds and is 18 inches long. Lungs are not mature, but most of the other body systems are completely developed. Nerve cells and connections are functioning and they can feel pain.
Week # 32 the baby is now 18.9 inches long and weighs about 4 #. Nails reach end of fingers and the skin is less red, more subcu fat, vernix is present and the wrinkled appearance is now gone. Plantar creases are more visible and the ear cartilage is soft. Testes are descending in males babies. The fat begins to form , and the fat continues to be stored as well as iron.
WEEK # 33 the baby is 19.4 inches and weighs 4.4 pounds.
Week # 34 the baby is 19.8 inches and weighs 5 pounds. The testicles descend into the scrotum now, if has not already.
Week # 35 the baby is 20.25 inches and weighs 5.5 pounds.
Week # 36 the baby is 20.5 inches and weighs 6 pounds.
Week # 37 the baby is 6.5 pounds and is about 21 inches long. The baby makes a hormone that matures the lungs. (cortisone) The lanugo is starting to wear off.
Week # 38 the baby is about 21.25 inches long and weighs about 6.5 pounds. The vernix begins to dissolve.
Week # 39 the baby is about 21.5 inches long and weighs about 7 #.
Week # 40 the baby is about 22 inches long and weighs about 7.5 pounds.