The third trimester spans which weeks?

The third trimester spans which weeks?

• A. 1-13 weeks
• B. 14-28 weeks
• C. 28-40 weeks
• D. 20-30 weeks

Answer: (C)

In pregnancy, trimesters describe broad stages of development. The third trimester begins at week 28 and lasts until birth, typically around week 40. During this period the fetus undergoes rapid growth and organ maturation (especially lungs), gains weight, and becomes more active. The uterus continues to enlarge, and prenatal visits focus on fetal size, position, and planning for delivery. The earlier ranges don’t define the third trimester: the first trimester is roughly weeks 1–13, the second around weeks 14–27, and a range like 20–30 would start before 28, so it doesn’t capture the whole third trimester.

In pregnancy, trimesters describe broad stages of development. The third trimester begins at week 28 and lasts until birth, typically around week 40. During this period the fetus undergoes rapid growth and organ maturation (especially lungs), gains weight, and becomes more active. The uterus continues to enlarge, and prenatal visits focus on fetal size, position, and planning for delivery. The earlier ranges don’t define the third trimester: the first trimester is roughly weeks 1–13, the second around weeks 14–27, and a range like 20–30 would start before 28, so it doesn’t capture the whole third trimester.