Formation of Twins (2)

Biology

Development of conjoined twins (2)

Although two foetuses are formed from the embryo, some of their physical parts are still fused together, usually the chest, abdomen or buttocks

Development of conjoined twins (3)

Conjoined twins may also share one or two internal organs

Identical twins (1)

Product of fertilisation of one ovum and one sperm forming one zygote

Identical twins (2)

Embryo divides into two

Identical twins (3)

One placenta is shared between two foetus

Identical twins(4)

The genetic makeup and physical appearances of these twins are similar as they are from the same zygote

Identical twins (5)

The sex of both twins is the same

Fraternal twins (1)

Product of fertilisation of two sperms and two ova forming two zygotes

Fraternal twins (2)

Embryo does not divide into two

Fraternal twins (3)

Each foetus has its own placenta