How do hCG levels behave in a viable intrauterine pregnancy typically?

In a viable intrauterine pregnancy, human chorionic gonadotropin (hCG) levels typically rise steadily. This hormone is produced by the placenta shortly after implantation and serves as a crucial indicator of pregnancy. During the early stages, particularly in the first trimester, hCG levels are expected to double approximately every 48 hours. This pattern of steady increase reflects the normal development of the pregnancy, supporting the growth of the embryo and the establishment of the placenta.

Monitoring hCG levels is essential in clinical practice because their behavior can provide valuable insights into the health of the pregnancy. A steady rise in hCG is a sign of a progressing and viable pregnancy. This is why other options, such as a drastic drop, static levels, or wide fluctuations, are not typical of a healthy, viable intrauterine pregnancy and would raise concerns about potential complications such as miscarriage or ectopic pregnancy.