After the embryo ceases to develop, some may naturally miscarry. Others may not be expelled naturally and require medical intervention for removal. After the embryo has stopped developing, the timing of expulsion varies from person to person due to different physical constitutions. Most women can naturally miscarry after the embryo stops developing, typically within about ten days when expulsion occurs. However, some embryonic tissue may be larger and adhere to the uterine cavity, preventing expulsion and causing continuous vaginal bleeding. In such cases, a visit to the hospital for an ultrasound is necessary, followed by medical abortion or a dilation and curettage procedure.