Some women undergo induced abortion manifest a series of symptoms such as slower heart beats, irregular heart rate, lowered blood pressure, paleness, dizziness and profuse perspiration. These symptoms, which occur during or after the procedure, are referred to as "a symptom complex." In 1977, 400 pregnant women were studied to determine the cause of this symptom complex: 263 healthy women who received normal treatment; 32 women with heart ailments associated with early pregnancy, who received acupuncture; and 105 women whose heart rates were below 90, who were injected with 0.5 mg atropine. Virtually all of the 263 women had a slower heart rate during the procedure. 33 (12.55%) of these women exhibited the symptom complex, and of these, 23 (69.17%) had cramps, 17 (51.52%) had abdominal swelling, and 2 (6.09%) had backaches. Most of these symptoms occurred when the cervix dilated and after the suction. The duration and seriousness of the symptom complex varied from woman to woman, as did the recovery period, which ranged from 3 to 63 minutes. It was also found that: 1) of the 263 patients, 110 were first time mothers, of whom 15 (13.63%) had the symptom complex; 2) of the 221 healthy women who had abortion by suction, 32 (14.48%) had the symptom complex, while 1 (2.38%) who had abortion by pincers, had the symptom complex; 3) of the 33 women who had the symptom complex, the loss of blood ranged from 10 ml to 200 ml, with an average loss of 50 ml; 4) there appears to be no relationship between the manifestation of the symptom complex and negative pressure; 5) electrocardigrams were taken for 20 of the healthy patients, none of whom showed a quickened heart rate during or after the procedure; and 6) treatment for the symptom complex was by acupuncture or by injection of Atropine. The 32 acupuncture patients suffered only backaches and lower abdominal swelling, but relief of pain was slow. 105 patients were administered Atropine, none of whom manifested the symptom complex. Only 19 women perspired slightly and felt chilled in the limbs, while 3 were nauseous. Of the 33 symptom complex patients, 5 had Atropine, most of whose heart rates returned to normal after 2 seconds to 2 minutes, as did their dizziness, perspiration, and ashen coloring. However, it was found that if no treatment was given after the symptom complex emerged, a majority of the patients returned to normal on their own, some taking as long as an hour. It is believed the occurrence of the symptom complex is directly related to the mechanical stimulus applied to the uterus or cervix, the vigorous shrinkage of the uterus, loss of blood, and the negative pressure suction power of the uterine wall. Further a mechanical stimulus to the uterus can cause an "errant" nervous reflex that will affect the heart rate. This errant nervous reflex can be cut off by an injection of Atropine.