<prompt> Placenta develops fromDecidua capsularis and Chorion frondosumDecidua capsularis and Decidua basalisDecidua basalis and Chorion frondosumDecidua parietalis and Chorion frondosum  <response>: Development of placenta: - Placenta has two components : Maternal Fetal When the blastocyst attaches to uterus in endometrium, the endometrium is called as decidua which is of three types: - Decidua basalis , Decidua capsularis Decidua parietalis. Fetus will also have some chorionic membrane developing leading to villi formation : Chorion Frondosum Chorion laeve. Chorion laeve will disappear. Chorionic Frondosum persists contributes to placenta along with Decidua Basalis . 