Which sequence lists the prenatal periods in correct chronological order from earliest to latest?

• A. Germinal, Embryonic, Fetal
• B. Embryonic, Germinal, Fetal
• C. Fetal, Germinal, Embryonic
• D. Germinal, Fetal, Embryonic

Answer: (A)

Prenatal development unfolds in a fixed progression of periods: germinal, embryonic, then fetal. The germinal period starts at conception with the zygote and lasts until implantation, roughly two weeks, when rapid cell division and implantation into the uterine lining occur. The embryonic period follows, roughly weeks three through eight, and is when the major organs and structures begin to form—this stage is focused on building the body plan, a process known as organogenesis. The fetal period then begins around week nine and continues to birth, marked by growth and refinement of tissues and organs and overall development, especially brain maturation and body size.

So the correct sequence from earliest to latest is Germinal, Embryonic, Fetal. Sequences that place Embryonic before Germinal or swap Fetal with an earlier stage don’t align with the actual timing of these developmental milestones.