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Questions and Answers
At what stage of development can fetal breathing movements be observed?
At what stage of development can fetal breathing movements be observed?
- 28-29 weeks
- 16-17 weeks
- 20-21 weeks (correct)
- 24-25 weeks
What substance is inhaled and exhaled during fetal breathing movements?
What substance is inhaled and exhaled during fetal breathing movements?
- Oxygen
- Amniotic sac fluid
- Amniotic fluid (correct)
- Carbon dioxide
Which maternal factor is known to boost the number of fetal breathing movements?
Which maternal factor is known to boost the number of fetal breathing movements?
- High caffeine intake
- High blood glucose levels (correct)
- Low blood pressure
- Increased hydration
What effect does tobacco use have on fetal breathing rates?
What effect does tobacco use have on fetal breathing rates?
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What is one potential benefit of fetal breathing movements?
What is one potential benefit of fetal breathing movements?
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Study Notes
Fetal Breathing Movements
- Observed starting at 20-21 weeks of fetal development.
- Involves muscle contractions leading to the inhalation and exhalation of amniotic fluid, pulmonary surfactant, and mucus.
- Patterns of fetal breathing are intermittent, characterized by periodic movements followed by no movements.
Maternal Influences
- High blood glucose levels (hyperglycemia) can increase the frequency of fetal breathing movements.
- Low blood glucose levels (hypoglycemia) may decrease the frequency of these movements.
- Tobacco use is associated with reduced fetal breathing rates.
Physiological Importance
- Fetal breathing movements may contribute to muscle tone development in preparation for post-birth breathing.
- These movements aid in the formation and maturation of alveoli in the lungs.
- Considered an indicator of fetal health and wellbeing; frequent movements suggest robust health.
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