By the end of the eighth week of pregnancy, or six weeks after conception, your baby might be about 1/2 inch (11 to 14 millimeters) long.
Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission.
Check out these best-sellers and special offers on books and newsletters from Mayo Clinic Press.
Last chance! Your gift today has 5X the power to fuel medical progress using AI.