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Table 2 Personal Belief about Stages at which Birth Control Methods May Act (n = 618)

From: Women and postfertilization effects of birth control: consistency of beliefs, intentions and reported use

  Stage 1 (b) Stage 2 (b) Stage 3 (b) Unsure
Birth Control Methods Percentage Responding (a)
Abstinence 82.0 (79.0,85.0) 11.2 (8.7,13.7) 5.5 (3.7,7.3) 9.1 (6.8,11.4)
Condoms 86.3 (83.6,89.0) 2.8 (1.5,4.1) 1.9 (0.8,3.0) 7.8 (5.7,9.9)
Sterilization 75.6 (77.2,79.0) 7.8 (5.7,9.9) 5.5 (3.7,7.3) 15.7 (12.8,18.6)
Abortion 6.2 (4.3, 8.1) 14.7 (11.9,17.5) 83.7 (80.8,86.7) 8.4 (6.2,10.6)
RU-486 4.7 (3.0,6.4) 20.4 (17.2,23.6) 54.5 (50.6,58.4) 33.3 (29.6,37.0)
Oral Contraceptives 70.2 (66.6,73.8) 22.3 (19.0,25.6) 3.6 (2.1,5.1) 18.5 (15.4,21.6)
Progestin-only pills 27.4 (23.9,30.9) 13.9 (11.2,16.6) 1.8 (0.8,2.8) 57.3 (53.4,61.2)
Intrauterine Devices 39.5 (35.6–43.4) 20.2 (17.0–23.4) 6.0 (4.1–17.9) 41.1 (37.2–45.0)
Depo-Provera 54.9 (51.0,58.8) 9.1 (6.8,11.4) 2.4 (1.2, 3.6) 35.1 (31.3,38.9)
Emergency Contraception 11.8 (9.3,14.3) 56.6 (52.7,60.5) 18.1 (15.1,21.1) 26.9 (23.4,30.4)
Natural Family Planning 59.1 (55.2,63.0) 8.3 (6.1,10.5) 7.8 (5.7,9.9) 30.9 (27.3,34.5)
  1. (a) Percentages do not add to 100% due to the selection of more than one stage as a response, missing responses and rounding. Parentheses include 95% confidence interval limits.
  2. (b) Stage 1 – Before fertilization – before the uniting of the sperm and the egg; Stage 2 – After fertilization but before implantation; Stage 3 – After implantation in the uterus.