Notas sobre gémeos

When conceiving twins (triplets or more) the woman usually releases 2 (or 3 or more) eggs at once. These eggs are then fertilised to create non-identical twins (or triplets etc.) The woman's ability to produce more than one mature egg at a time is something that is inherited (and why non-identical twins are more common, because they 'run in the family').

Identical twins only occur after fertilisation takes place. The fertilised egg (with all the combined genes from both parents) suddenly splits into two identical developing babies. This is a twist of fate that happens less frequently, but is possible for any couple, because it is not something that is inherited.

Mais aqui


update: e entretanto li numa revista sobre um estudo recente que indica que o consumo regular de leite aumenta a probabilidade de gémeos ;) lol