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In Vitro Fertilization

In Vitro Fertilization

In vitro fertilization (IVF) is a form of assisted reproductive technology where an egg is fertilized with sperm in a controlled laboratory environment before transferring the resulting embryo into the uterus. This process is designed to help individuals and couples experiencing difficulties conceiving.
The IVF process begins with ovarian stimulation, during which reproductive endocrinologists prescribe hormonal medications to stimulate the ovaries to produce multiple eggs instead of the single...

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Related Experiment Video

Updated: Apr 7, 2026

Author Spotlight: Advancing Therapeutic Strategies for Improving Pregnancy Rates by Analyzing Embryo-Endometrium Interactions

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Toward Implantation-Assisting Technologies: Lessons From In Vivo and Ex Vivo Models.

Takehiro Hiraoka^1,2, Yasushi Hirota¹, Masahito Ikawa^2,3,4,5,6

¹Department of Obstetrics and Gynecology, Graduate School of Medicine The University of Tokyo Tokyo Japan.

Reproductive Medicine and Biology

|April 6, 2026

Summary

This summary is machine-generated.

Understanding embryo implantation requires studying molecular mechanisms. Research reveals key steps in uterine receptivity, embryo attachment, and invasion, crucial for successful pregnancy and overcoming implantation failure.

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Single Cell Collection of Trophoblast Cells in Peri-implantation Stage Human Embryos

Single Cell Collection of Trophoblast Cells in Peri-implantation Stage Human Embryos

Published on: June 12, 2020

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Single Cell Collection of Trophoblast Cells in Peri-implantation Stage Human Embryos

Single Cell Collection of Trophoblast Cells in Peri-implantation Stage Human Embryos

Published on: June 12, 2020

Area of Science:

Reproductive Biology
Developmental Biology
Genetics

Background:

Assisted reproductive technology (ART) faces challenges with embryo implantation inefficiency.
Recurrent implantation failure highlights gaps in understanding molecular mechanisms.
Successful pregnancy is hindered by suboptimal embryo implantation rates.

Purpose of the Study:

To synthesize current knowledge on embryo implantation mechanisms.
To explore the role of genetically modified mouse models and ex vivo systems.
To elucidate the hierarchical, multistep process of implantation.

Main Methods:

Review of studies using genetically modified mouse models.
Utilizing an ex vivo uterine system with authentic uterine tissue.
Analysis of molecular signaling pathways governing implantation stages.

Main Results:

Uterine receptivity depends on progesterone signaling.
Embryo attachment involves FOXA2 and LIF-STAT3 pathways.
Trophoblast invasion requires coordinated epithelial, stromal, and embryonic events.
Disruptions in these mechanisms cause implantation failure.

Conclusions:

Implantation is a hierarchical process with regulatory checkpoints.
The ex vivo uterine system aids in studying embryo-uterine interactions.
Mechanistic insights can drive the development of new reproductive technologies.