An unprecedented procedure to correct the congenital malformation of a 33-week-old fetus was performed at the Hospital da Criança e Maternidade, in São José do Rio Preto, São Paulo state, in June. The ...
If non-identical twins are born from two totally different zygotes (fertilised eggs), identical twins form by the splitting of one zygote (fertilised egg) into two foetuses. Problems can arise when ...
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