Understanding the Chances of a Baby Developing Meconium Aspiration Syndrome (MAS)
Meconium Aspiration Syndrome (MAS) is a condition that affects a certain percentage of newborns during delivery. Research shows that approximately seven to 22% of all deliveries are affected by this syndrome. However, in pregnancies that go beyond the normal 40 weeks and reach 42 weeks, the likelihood of MAS increases to around 30%.
Meconium, which is the baby’s first stool, plays a significant role in the development of MAS. The hormone motilin is responsible for stimulating bowel movements and peristalsis, the movement of the intestines. During birth, the vagal nerve stimulation contributes to the maturation of the innervation in the intestinal tract, leading to the passage of meconium. When this process is disrupted, it can result in the aspiration of meconium into the baby’s airways, causing MAS.
The Safety of Breech Births in Relation to MAS
When it comes to breech births, there are various factors that can contribute to this position, such as abnormal levels of amniotic fluid, uterine growths like fibroids, and premature delivery. In a breech birth, the fetus is positioned with the head upwards, rather than downwards towards the vaginal canal. While medical professionals have the ability to correct breech positions through a procedure known as external cephalic version (EVC) during prenatal care, cesarean births are often deemed the more common and preferred solution.
However, even in the case of c-section deliveries, there is still a potential risk for the development of meconium aspiration syndrome (MAS). MAS occurs when the fetus is exposed to meconium, a substance present in the baby’s gut, before birth. This means that c-section-born babies can still be susceptible to this condition despite the method of delivery chosen.