| Guidepost 1: How does conception normally occur? |
| Guidepost 2: What causes multiple births? |
| Guidepost 3: How does heredity operate in determining sex and transmitting normal and abnormal traits? |
| Guidepost 4: How do scientists study the relative influences of heredity and environment, and how do heredity and environment work together? |
| Guidepost 5: What roles do heredity and environment play in physical health, intelligence, and personality? |
| Guidepost 6: What are the three stages of prenatal development, and what happens during each stage? |
| Guidepost 7: What can fetuses do? |
| Guidepost 8: What environmental influences can affect prenatal development? |
| Guidepost 9: What techniques can assess a fetus's health and well-being, and what is the importance of prenatal care? |
