Threatened abortion is a medical condition that refers to vaginal bleeding during the early stages of pregnancy, which increases the risk of loss of the fetus. Instead of using the term "threatened abortion," other medical terms can be used to describe this condition. These synonyms include "subchorionic hematoma," which refers to the accumulation of blood between the membranes of the placenta, "bleeding in early pregnancy," which is a more general term that describes any vaginal bleeding during the early stages of pregnancy, and "miscarriage threat," which is a term that is commonly used by medical professionals to describe the risk of losing a fetus during early pregnancy. By using these synonyms, medical professionals can communicate the condition with clarity and accuracy.