placenta

Table of Contents

Introduction References & Edit History Related Topics

Videos

How a human embryo develops into a fetus

Discover

Mona Lisa, oil on wood panel by Leonardo da Vinci, c. 1503-06; in the Louvre, Paris, France. 77 x 53 cm.

Why Is the Mona Lisa So Famous?

Baseball laying in the grass. Homepage blog 2010, arts and entertainment, history and society, sports and games athletics

10 Greatest Baseball Players of All Time

Close up of books. Stack of books, pile of books, literature, reading. Homepage 2010, arts and entertainment, history and society

12 Novels Considered the “Greatest Book Ever Written”

Los Angeles Police Department wanted flyer on Elizabeth Short, aka the "Black Dahlia," who was brutally murdered in January 1947. The FBI supported the Los Angeles Police Department in the case, including by identifying Short through her fingerprints that

America’s 5 Most Notorious Cold Cases (Including One You May Have Thought Was Already Solved)

Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.

10 Famous Artworks by Leonardo da Vinci

Santa Claus flying in his sleigh, christmas, reindeer

Was Santa Claus a Real Person?

Rural Irish landscape, Sligo, Ireland.

Why Is Ireland Two Countries?

placenta: Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Videos

How a human embryo develops into a fetus

See All Videos →

Topics

chorion deciduate placenta syndesmochorial placenta epitheliochorial placenta placental barrier nondeciduate placenta chorionic placenta yolk-sac placenta chorioallantoic placenta afterbirth

Dig Deeper: More Articles That Discuss This Topic

pregnancy: Diseases of the placenta