However, studies show that IVF also increases the chance of having identical twins, meaning the embryo is more likely to split after IVF than when naturally conceived. "IVF pregnancies have a ...

If the split happens: Not always. One study found that 15% of identical twins have some genetic variations ... there are changes in the DNA that occur after the embryo splits, and this affects ...

Once split, the embryos create near-replicas of themselves. Identical twins. This quirk of nature has given synchronised divers Helen and Carol Galashan a distinct advantage. "Being an identical ...

Conjoined fetuses are a rare type of identical twins that share a placenta and an amniotic sac, when the embryo divides at 13-15 days from conception. The incidence ranges from 1/50,000-1/100,000 ...