Injury to the internal iliac artery can occur, leading to hypovolaemic shock.

Neurogenic and hypovolaemic shock can also cause fainting.

Signs can also be due to abruptio placentae including uterine hypertonus, fetal distress, fetal death, and rarely, hypovolaemic shock (shock secondary to severe blood loss).

If blood pressure falls, such as on orthostatic hypotension or in hypovolaemic shock, baroreceptor firing rate decreases and baroreceptor reflexes act to help restore blood pressure by increasing heart rate.