Many but rare: The most common is trisomy 21 also known as down's syndrome. You can have too many y chromosomes (klinefelters) or a missing x (turners). There are many others, mostly rare and probably a lot of others that are lethal so that even though an egg is fertilized and implants, it does not develop well enough for survivial in utero.
Answered 6/30/2018
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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