In which trimester does the following occur? the respiratory system becomes mature. first second third

Respiratory system becomes mature in 3rd trimester. That is critical for the infant to live outside of womb. Physicians can test the infants lung maturity prior to birth if the mother going into labor. Between 36 & 38 weeks in the pregnancy the infant is deemed stable should the mom go into labor

This actually happened to me. I developed pre-mature labor but I was at 35 weeks & the docs put me on bed rest for another 2 weeks so my daughter could be born safely with no fear of respiratory failure. She was delivered fine & she 23 years old now.

Bisexual is when you like boys and girls.i hope that

Habit 1: be proactive  habit 2: begin with the end in mind  habit 3: put first things first  habit 4: think win-win  habit 5: seek first to understand, then to be understood  habit 6: synergize  habit 7: sharpen the saw