32 st week of pregnancy: developing lungs

At 32 weeks of pregnancy, your baby's organs are mature, except for the lungs, which will need a few more weeks of development. The lung alveoli are multiplying and the capillary network is expanding. Surfactant, which will help your baby's alveoli expand on inhalation and keep them open on exhalation, continues to be produced.

In your baby's intestines, meconium, a dark slimy substance, accumulates and is passed out during the first few days of life.