Sequence of growth and development of foetus in womb..?? Right answe- 50points with brainliest
Answers
Answer:
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Explanation:
Fetal Stage
Once cell differentiation is mostly complete, the embryo enters the next stage and becomes known as a fetus. The fetal period of prenatal develop marks more important changes in the brain. This period of development begins during the ninth week and lasts until birth.
blished in the embryonic stage continue to develop. It is at this point in prenatal development that the neural tube develops into the brain and spinal cord and neurons continue to form. Once these neurons have formed, they begin to migrate to their correct locations. Synapses, or the connections between neurons, also begin to develop.
It is during the period between the 9th and 12th week at the earliest reflexes begin to emerge and the fetus begins to make reflexive motions with his arms and legs.
This stage of prenatal development lasts the longest and is marked by amazing change and growth. During the third month of gestation, the sex organs begin to differentiate and by the end of the month, all parts of the body will be formed. At this point, the fetus weight around three ounces. The fetus continues to grow in both weight and length, although the majority of the physical growth occurs in the later stages of pregnancy.
The end of the third month also marks the end of the first trimester of pregnancy. During the second trimester or months four through six, the heartbeat grows stronger and other body systems become further developed. Fingernails, hair, eyelashes, and toenails form. Perhaps most noticeably, the fetus increases quite dramatically in size, increasing about six times in size.
So what's going on inside the brain during this important period of prenatal development? The brain and central nervous system also become more responsive during the second trimester. Around 28 weeks, the brain starts to mature faster with an activity that greatly resembles that of a sleeping newborn.
During the period from seven months until birth, the fetus continues to develop, put on weight, and prepare for life outside the womb. The lungs begin to expand and contract, preparing the muscles for breathing.
Answer:
Childbirth progresses in three stages: labor, delivery of the baby and delivery of the placenta. Unless labor is cut short by a C-section, all women go through labor, the first stage of childbirth. Labor is in turn broken down into three phases: early, active and transitional
