Question

what is placentation in short

Answer 1

The placenta is an organ attached to the lining of women's womb during pregnancy.
It keeps unborn baby's blood supply separate from mother's own blood supply as well as providing link between the two. The link enables the placenta to carry out the functions that unborn baby can't perform for itself.

Now coming to placentation. Placentation is the formation or arrangement of a placenta in a women's or female animal's uterus

Answer 2

Intimate connection between foetus and uterine wall of mother is called placenta...It develops fronm chorion..its arrangement is called placentation...human placenta is deciduate,hemochorial type