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From the first moment the cells begin to divide and create an embryo, fetal development and the stages of pregnancy progress in an established sequence. When the egg is fertilized, a zygote develops. In this first stage, which occurs in the first 2 weeks of the pregnancy, the cells multiply and develop. The next phase of fetal development and the stages of pregnancy occurs when the zygote becomes an embryo. During week 3, the embryo starts to develop the buds that will become the arms and legs of the fetus. The digestive system also has basic beginnings at this time. 

By the 5th week of fetal development and the stages of pregnancy, the facial features have started to form. The embryo has now begun to produce hormones and the presence of these hormones stop the mummy’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 conspicuous 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, although they can not be distinguished at this time in an ultrasound. Bones are beginning to form and the muscles can contract. By the end of the first trimester, the fetus is approximately three inches in length and weighs only about an ounce. During the 2nd 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 in this time a mummy will start to feel movement. As this period progresses, the fetus will develop waking and sleeping cycles that the mother will shortly be able to detect and recognize. At the 24th week, a usually developed fetus is about twelve inches long and weighs about 2 pounds. It would be able to survive, with assistance from current medical technology, if it were delivered. In the last weeks of fetal development and the stages of pregnancy, or the 3rd trimester, the bones are developed, though they are still pliable. The fetus can inhale, 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. Almost all of the movement occurs as the fetus shifts its position in preparation for birth. At the age of 30 weeks, the fetus would be little and considered early, but it could be capable of living on its own if it were delivered. The fetus is considered fully developed at the age of 38 weeks and would be fully capable of living on its own if delivered, although the standard finish date is considered to be at the end of the 40th week.

Do you find the information here useful? If yes, visit pregnancy101.org to get all the information about having a baby and have a look at pregnancy symptoms 9 weeks.

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