Monochorionic-diamniotic (MCDA) twins are twins that share a placenta but have their own amniotic sac. They are almost always monozygotic, meaning that they come from one egg that is fertilized by one sperm, and therefore are identical.Monochorionic-diamniotic twins occur in 0.3% of all pregnancies...
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At the time of birth, a female baby has over six million eggs in her body which reduces to several hundred thousand as puberty hits. As she ages, the total number of eggs in ovaries keeps falling,...
By: Kelly Park
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