From the 1st moment the cells start to divide and create an embryo, fetal development and the stages of pregnancy progress in a longtime sequence. When the egg is fertilized, a zygote develops. In this first stage, which happens in the first 2 weeks of the pregnancy, the cells multiply and develop. The following segment of fetal development and the stages of pregnancy happens when the zygote becomes an embryo. During week 3, the embryo starts to develop the buds that may become the arms and legs of the fetus. The digestive system also has rudimentary beginnings at this time.
By the fifth week of fetal development and the stages of pregnancy, the facial features have started to form. The embryo has begun to produce hormones and the presence of these hormones stop the mum’s menstrual cycle. When the embryo becomes about an in.
long, about the 6th week of the fetal development and the stages of pregnancy, the brain has begun to develop its component parts ; facial features, toes and fingers are obvious and a heartbeat can be detected in an ultrasound test. In the n ext many weeks, the organs continue to develop and the features become more distinguishable. The genitalia form, though they can not be distinguished at this time in an ultrasound. Bones are starting to form and the muscles can contract. By the end of the 1st trimester, the fetus is approximately three inches in length and weighs only about an oz. During the second trimester of fetal development and the stages of pregnancy, the fetus continues to develop the traits that make it recognizable as a human baby. Development has progressed to the point that the fetus will begin to move a touch ; it is during this time that a mother will start to feel movement. As this period progresses, the fetus will develop waking and sleeping cycles the mum will soon be in a position to detect and recognize. At the 24th week, a normally developed fetus is about twelve inches long and weighs about two pounds. It might be able to survive, with assistance from current medical technology, if it were delivered. During the last weeks of fetal development and the stages of pregnancy, or the third trimester, the bones are developed, though they are still pliable. The fetus can breathe, exhale, and even cry. The eyelids open and the lungs continue to develop till the time of birth. The fetus gains in size and moves less because there’s less room to maneuver. The majority of the movement happens as the fetus shifts its position in preparation for birth. At the age of 30 weeks, the fetus would be small and considered premature, but it might be capable of living on its own if it were delivered. The fetus is regarded entirely developed at the age of 38 weeks and would be completely capable of living on its own if delivered, although the normal delivery date is thought to be at the end of the 40th week.
To read more about pregnancy and baby, visit pregnancy101.org and while you are it, you can learn more about pregnant 9 weeks.
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