Which finding is least likely in a patient suspected of having a spontaneous abortion?

In the context of a patient suspected of having a spontaneous abortion, the findings typically include symptoms that are directly related to the loss of a pregnancy. Cramping lower abdominal pain is common as the body undergoes changes during this process. Similarly, passing tissue or blood clots from the vagina and experiencing moderate to severe vaginal bleeding are both indicators that may accompany a spontaneous abortion, reflecting the physiological response of the body in this situation.

Fluid retention and hypertension, on the other hand, are not typical signs of a spontaneous abortion. These symptoms are more commonly associated with other conditions, such as preeclampsia or other pregnancy-related complications. Their presence does not align with the expected clinical findings of a spontaneous abortion, making them the least likely to occur in this scenario. Therefore, option C is the correct choice, as it identifies the symptom that is least associated with a spontaneous abortion.