In AP Psychology, prenatal development refers to all the physical growth that happens inside the womb from conception to birth, moving through the germinal, embryonic, and fetal stages, where biological factors like hormone exposure also begin shaping later traits.
Prenatal development is everything that happens between conception and birth. It runs through three stages: the germinal stage (the zygote dividing and implanting), the embryonic stage (where major organs and structures start forming in the embryo), and the fetal stage (where the fetus grows and matures). The placenta is the lifeline here, passing nutrients and oxygen from parent to developing baby and filtering out some harmful substances.
For AP Psych, prenatal development matters for two different reasons. In topic 6.1, it's the starting line for physical development across the lifespan. In topic 6.7, it shows up in biological theories of gender and sexual orientation, where prenatal hormone exposure is thought to influence how gender identity and orientation develop. So the same stage of life connects a question about physical milestones and a question about why people differ in identity.
Prenatal development lives in Unit 6 (Developmental Psychology), specifically topics 6.1 (The Lifespan and Physical Development in Childhood) and 6.7 (Gender and Sexual Orientation). It's the foundation for understanding development as a continuous process that starts before birth, not at it. In 6.7, it supports the biological perspective: the idea that hormone exposure in the womb can shape gender identity and sexual orientation alongside, not instead of, environmental factors. That makes it a useful term for nature-vs-nurture questions, since it sits right on the nature side while still interacting with later experience.
Keep studying AP Psychology Unit 6
Embryo and Fetus (Unit 6)
These are the two main named stages inside prenatal development. The embryo is the early phase where organs form, and once those structures are in place it becomes a fetus that grows and matures until birth. Knowing the order keeps stage questions easy.
Placenta (Unit 6)
The placenta is the structure that connects the developing baby to the parent's blood supply. It delivers nutrients and oxygen, which is exactly why teratogens (harmful substances that cross it) can disrupt prenatal development.
Evolutionary Perspective (Unit 6)
Biological theories of gender and orientation lean on prenatal hormone exposure, which fits the evolutionary and biological view that some traits are rooted in inherited, body-based processes rather than purely learned ones.
Ecological Systems Model (Unit 6)
Bronfenbrenner's model is the environment side of the story. Pair it with prenatal development and you've got the full nature-and-nurture picture: biology sets things in motion in the womb, and surrounding systems shape development afterward.
On the multiple-choice section, prenatal development shows up most in biological-theory questions about gender and sexual orientation. Expect stems asking what role prenatal hormones play in shaping gender identity, or which biological factor most influences sexual orientation according to current research. A trickier version asks why it's hard to prove that prenatal hormone exposure causes later identity, and the answer points to the limits of correlational research (you can't ethically run an experiment manipulating fetal hormones, so causation stays murky). No released FRQ has used this term verbatim, but it supports nature-vs-nurture and developmental-stage arguments that free-response prompts reward. Your job is to connect the biological starting point to later development without overclaiming a one-to-one cause.
The embryonic stage is just one part of prenatal development, not the whole thing. Prenatal development is the full span from conception to birth (germinal, embryonic, and fetal stages combined), while the embryonic stage is the specific middle window where major organs first form.
Prenatal development covers the entire period from conception to birth and moves through three stages: germinal, embryonic, and fetal.
The placenta connects the developing baby to the parent and lets nutrients in while filtering some (but not all) harmful substances.
Biological theories say prenatal hormone exposure can influence gender identity and sexual orientation, placing it on the nature side of the debate.
Causation between prenatal hormone levels and later identity is hard to prove because the research is correlational, not experimental.
On the AP exam, prenatal development appears in topic 6.1 as the start of physical development and in topic 6.7 within biological explanations of gender and orientation.
It's all the growth that happens in the womb from conception to birth, passing through the germinal, embryonic, and fetal stages. In AP Psych it matters both as the start of physical development (6.1) and as part of biological theories of gender and orientation (6.7).
Not exactly determine. Biological theories say prenatal hormone exposure contributes to variations in orientation and gender identity, but it's one influence among several. Researchers can't prove direct causation because they can't ethically run experiments on fetal hormone levels, so the evidence stays correlational.
Prenatal development is the whole journey from conception to birth, while the embryonic stage is just the middle phase where organs and major structures first form. The embryonic stage sits between the germinal stage and the fetal stage.
Because the studies are correlational. You can't ethically design an experiment that controls how much hormone a fetus is exposed to, so a link between exposure and later identity doesn't prove one caused the other.
Mostly nature, since it's about biological processes in the womb, but it still interacts with environment. Prenatal exposure to substances or stress can affect outcomes, so it's a clean example of how nature and nurture overlap from the very beginning.