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Eligibility After Hours Care Clinical Services Emergencies General Health Immunizations Important Information on Immunizations Pre-Registration Requirements Phone Directory Privacy Policy Related Links Student Health Insurance Waiver		Birth Control Effectiveness How Effective are Birth Control Methods? Method Effectiveness Pregnancies * Abstinence 100% 0 Sterilization 99+% 0-1 Norplant 99+% 0-1 Birth Control Pills 97% 3 IUD 97% 3 Condom and Foam approx. 95-98% 2-5 Condom 88% 12 Diaphragm and spermicide 82% 18 Sponge 82% 18 Cervical Cap 82% 18 Coitus Interruptus (Withdrawal) 82% 18 Rhythm (Natural Family Planning) 80% 20 Foam, Cream, Jelly, or Suppositories 79% 21 No Method (Chance or "Luck") 15% 85 * number of pregnancies in 100 typical users over one year's use

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