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