Which type of abortion has an open cervical os without any products of conception expelled?

Inevitable abortion is characterized by the presence of an open cervical os while no products of conception have been expelled. In this situation, the cervix begins to dilate, signaling that a miscarriage is likely to occur, but the fetal tissue has not yet been passed. This condition often accompanies symptoms such as abdominal cramping and back pain, along with vaginal bleeding.

Understanding this scenario helps clarify the term “inevitable,” as it indicates that the process of miscarriage is underway and cannot be stopped, which distinguishes it from other types of abortion. In contrast, a threatened abortion involves a closed cervical os and some bleeding, indicating that the pregnancy may still continue. Incomplete and complete abortions involve the expulsion of some or all products of conception, which is not applicable here, as the question specifically notes that no products have been expelled.