Unveiling the human fetal-maternal interface during the first trimester: biophysical knowledge and gaps.

Area of Science:

• Obstetrics and Gynecology
• Developmental Biology
• Biomedical Engineering

Background:

• The placenta and fetal-maternal interface are vital for pregnancy success.
• Gaps exist in understanding early placental biomechanics, transport, and circulation.
• Methodological variations and data conflicts complicate research on fetal-maternal interactions.

Purpose of the Study:

• To provide a comprehensive review of fetal-maternal interface structures in the first trimester.
• To discuss embryological development, structural characteristics, and physiological functions of key placental components.
• To describe maternal and fetal fluid dynamic exchanges.

Main Methods:

• Literature review focusing on first-trimester placental development.
• Discussion of placental chorionic plate and villi, fetal membranes, and umbilical cord.
• Analysis of maternal and fetal fluid dynamics.

Main Results:

• Detailed overview of first-trimester placental structures and functions.
• Identification of challenges in studying early placental development due to ethical and technological constraints.
• Highlighting the utility of in vitro models, microfluidics, and computational simulations.

Conclusions:

• Sophisticated in vitro and microfluidic models are needed to overcome study limitations.
• Integration of data from later stages and simulations aids understanding.
• Further research into cellular and molecular mechanisms is essential for improving prenatal care and outcomes.