33 Weeks Pregnant

Trimester: 
Third

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  • Amniotic fluid is at its highest level during your pregnancy.
  • At 33 weeks pregnant, your baby's head size has increased 3/8ths of an inch due to rapid brain growth.
  • Neurons and synapses are developing in huge numbers -- forming connections in your baby's brain will give him the skills he needs to thrive as a newborn. This week, he may be able to coordinate sucking and swallowing with breathing.
  • While most of his bones are hardening, his skull is quite pliable and not completely joined. The bones will be able to move slightly to make birthing easier.
  • Your baby takes intermittent deep breaths -- of water! That's okay, though since she gets oxygen from the placenta. This breathing exercises muscles and encourages her lung cells to produce more surfactant (a protein essential for healthy lung development).
  • At week 33 of your pregnancy, if your baby is a boy, his testicles will be descending from his abdomen into his scrotum. Sometimes one or both testicles won't move into position until after birth.
  • After 33 weeks of pregnancy, your infant is now 17.2 inches (43.7cm) long and weighs 4.23 pounds (1918gm).

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