Starting this week your baby may position himself upside down, in the birth position, but it’s also possible he will change position several times. You will notice that your baby is in a different position because you may feel his kicking more strongly around the rib area.

Your baby keeps breathing in amniotic fluid and even inhaling deeply, although for now it is only liquid. This movement is important not only because it exercises the breathing muscles but because it stimulates the production of surfactant, a substance that helps the development of his lungs and enables breathing at birth.

His head continues to grow due to the spectacular number of neurons and brain cells it keeps producing. Nevertheless, the bones in his skull aren’t fused yet, and won’t completely until after birth, to make it easier for him to fit through the birth canal.

This week your baby measures over 17 inches or almost 44 centimeters and weighs around four pounds and a half or almost two kilograms.