A YOUNG woman has shared how she is one of the rarest types of twins in the world. Hope Baxter and her sister, Faith, are ...

Is there a third type of twin? Some researchers speculate about a third category: polar body twins or half-identical twins. This rare phenomenon might occur when an egg splits into two parts ...

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 ...

Monoamniotic twins are identical twins that share an amniotic sac and placenta and is a rare type of twin pregnancy. Due to one placenta, these babies have a vascular connection called anastomosis ...