How big is the fetus at two months of pregnancy?

At two months of pregnancy, if no embryo has formed, only the gestational sac may be visible on ultrasound, typically measuring approximately 4–5 cm in diameter. By this stage, the fetal pole and fetal heartbeat should already be detectable, and a routine ultrasound examination should clearly reveal the outlines of the fetus’s mouth, eyes, and ears. Additionally, human chorionic gonadotropin (hCG) levels usually continue to double as expected. During pregnancy, it is essential to attend scheduled prenatal check-ups at the hospital to closely monitor fetal development.