Twins: if you are having twins then there is about 1/3 chance that they will be of the same gender as it would be from monozygote ie one egg and one sperm thus you have a 2/3 chance that there are 2 eggs (Dizygotic) and if they are dizygotic there is about 50 percent chance that they will be of different genders so in short you have a 1/3 chance of carrying twins of different genders. If you do not know
Answered 11/24/2014
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