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.
Hurry! Your gift now goes 2× as far to help more patients.