Figure 4 (IMAGE) Impact Journals LLC Caption Figure 4. Timeline of human embryogenesis showing the developmental stages and the emergence of different features of life. Credit 2024 Loseva and Gladyshev. Usage Restrictions Original Content License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.