The Five Stages of Fetal Lung Development
Video taken from the channel: NICUniversity.org
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How Babies’ Lungs Develop In and Out of the Womb 2019
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Video taken from the channel: National Geographic
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Lung development in humans happens over five different stages. After the embryo stage, a baby’s lungs develop in what’s called the pseudoglandular stage. During this stage, which lasts from about 5 weeks to 17 weeks gestation, the baby’s lungs can be compared to a tree trunk with branches sprouting from it.
A lung bud develops from a tube of cells called the foregut (which will itself later go on to form the gut). This bud separates into two. These two buds will eventually become your baby’s right and left lungs. Your baby makes lung movements in the womb as if they are practising breathing. The process starts at 6 weeks of pregnancy, when a small pouch of tissue called the lung bud is created from the front wall of the tube that will become your baby’s esophagus.
Over the next week, this single bud will split into two separate buds (one for each lung), and the windpipe will start to form between them. Lung development begins early in pregnancy, but is not complete until the third trimester. Between 24–36 weeks of pregnancy, the lungs begin developing alveoli – the tiny lung sacs that fill. As the baby’s lungs continue to develop, more alveoli are added during a stage called the saccular stage because the lungs begin to resemble collapsed sacs.
This stage lasts until about 35 weeks of. Scientists develop fluid-filled artificial womb to help premature babies. Kate Kelland and set up the system so that this flowed into and out of the bag.
Lung development in fetal lambs is. As the baby develops during weeks six through ten of pregnancy, the intestines get longer and push out from the belly into the umbilical cord. By the eleventh week of pregnancy, the intestines normally go back into the belly. If this does not happen, an omphalocele occurs. The omphalocele can be small, with only some of the intestines outside.
In the womb, the baby’s lungs are filled with fluid. This is normal and healthy. During labor, your baby’s body releases chemicals to help their lungs push out the fluid. The pressure of the birth.
Thinking about V-day made me think of the lung development of babies. When I was pregnant with DS I started having contractions that were very strong and started making some progress around 35 weeks. The nurses kept telling me that boys had a harder time at a younger age than girls specifically the lung development.
Thus they were considered full term. But I’ve seen a few episodes of A Baby Story and those types of shows, where the doctors have done an amnio at 37-38 weeks to test for lung development and found that the lungs weren’t fully developed, so they couldn’t induce the mom’s early like they wanted to.
List of related literature:
|from Essential Concepts for Healthy Living|
|from Textbook of Diagnostic Sonography E-Book: 2-Volume Set|
|from Nurse Anesthesia E-Book|
|from Human Anatomy’ 2007 Ed.2007 Edition|
|from Nurse Anesthesia E-Book|
|from Anatomy and Physiology for Midwives E-Book|
|from The Developing Human E-Book|
|from Maternal, Fetal, & Neonatal Physiology: A Clinical Perspective|
|from Infant and Toddler Development from Conception to Age 3: What Babies Ask of Us|
|from Nunn’s Applied Respiratory Physiology eBook|