Fetus early 2nd trimester
• Gut no longer herniated

• Dilute urine, metanephros

• Liver produces serum
   albumin stores glycogen,
   secretes bile

• Lungs gland like

• Endocrine glands partially
   functional

• Myelination spinal roots and
   cord has begun

• Hiccup, swallow, gasp, yawn

• Gender differences recognizable