The anatomy of the normal placenta

Area of Science:

• Developmental Biology
• Reproductive Medicine
• Histology

Background:

• The placenta is a vital fetal organ facilitating maternal-fetal exchange.
• Its development must align with its essential transport and secretory functions.
• Understanding early placental formation is key to reproductive health.

Purpose of the Study:

• To describe the development of the placenta during the initial weeks of pregnancy.
• To detail the establishment of the villous trees and their vasculature.
• To provide an overview of placental anatomy and histology.

Main Methods:

• Review of existing literature on early placental development.
• Description of macroscopic and microscopic placental anatomy.
• Identification and description of key cellular components and structures.

Main Results:

• Detailed account of placental development from early pregnancy stages.
• Establishment of villous trees and their vascular networks.
• Description of villous trophoblast, Hofbauer cells, mesenchymal cells, endothelium, and fibrinoid.

Conclusions:

• Early placental development is a complex process ensuring functional capacity.
• The established villous structure is critical for maternal-fetal exchange.
• This review consolidates knowledge on placental anatomy and histology for researchers.