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Investigation 4: Preparing for Birth - Late Fetal Development
Explore the remarkable final stages of human prenatal development. In this Investigation, students examine how the developing fetus is protected, supported, and increasingly responsive during the third trimester. Through hands-on modeling activities, students explore the role of amniotic fluid in cushioning the fetus, allowing movement, and transmitting sound. They also investigate how sound waves travel through fluid and tissue, helping explain how a baby can hear and respond to the external world before birth. Together, these experiences reveal that life in the womb is active, dynamic, and carefully supported as the fetus prepares for birth.
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Student PDF Lab Guide
Teacher PDF Lab Guide
Next Generation Science Standards: Investigation 4
MS-LS1-1:
Conduct an investigation to provide evidence that living things are made of cells; either one cell or many different numbers and types of cells.
→ Students investigate how the developing fetus is supported and protected during the third trimester by biological structures such as the amniotic sac and amniotic fluid, reinforcing that prenatal development depends on living systems functioning at the cellular and tissue levels.
MS-LS1-2:
Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.
→ Through hands-on simulations, students model how amniotic fluid functions as part of a larger biological system—supporting movement, protection, and sensory development—illustrating how structure and environment contribute to function during prenatal development.
MS-PS4-1:
Use mathematical representations to describe a simple model for waves that includes how the amplitude of a wave is related to the energy in a wave.
→ In the fetal hearing simulation, students observe how sound waves travel through water more effectively than air, modeling how sound energy passes through amniotic fluid to reach the developing fetus during the third trimester.
MS-ETS1-2:
Evaluate competing design solutions using a systematic process to determine how well they meet the criteria and constraints of the problem.
→ Students compare conditions with and without amniotic fluid during the protection simulation, evaluating how well fluid-filled environments protect the fetus from external forces, similar to how scientists assess protective biological systems.