You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when do babies start breathing on their own?" whose answer is about 10 seconds after delivery.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when do babies start breathing on their own in pregnancy
Useful Output:

Doc 1: A baby born at 31 weeks has not had a chance to fully develop their lungs, immune system, sucking reflex, or enough body fat to maintain their body temperature.
Doc 2: Between around 24 week and 36 weeks of pregnancy, their lungs will start to develop alveoli – small air sacs which fill up with oxygen. But as
Doc 3: The lungs are usually not fully formed until week 36 of pregnancy. When a baby is born, hormonal changes and labor itself stops a baby's lungs
Doc 4: During weeks 10 and 11 of pregnancy, the developing baby inhales tiny bits of amniotic fluid. This “inhalation” is more like a swallowing
Doc 5: Although fetal breathing movements begin as early as week 10 of pregnancy, they start in earnest starting at about week 20. Since they're not