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A member asked:
What is the main cause of chromosomal abnormality in fetus?
A doctor has provided 1 answer
Defect in gamete: Either the egg (usually) or sperm carries an extra chromosome (chm) to conception.The fetus ends up with 3 of that chm along with normal pairs of all the others. The third chm will cause a disruption in the code reading that goes into making the organs and brain. The newborn will be born with these defects.
Answered 6/2/2014
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