Contraceptive Measures After Unprotected Sex (cont.)
Melissa Conrad Stöppler, MD
Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.
William C. Shiel Jr., MD, FACP, FACR
Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.
In this Article
Emergency IUD insertion can also be used to prevent a pregnancy after unprotected sex. If the copper IUD (Paragard) is inserted within 5 days after unprotected sex, it is 99% effective in preventing pregnancy. The copper IUD has the lowest failure rate of all emergency contraception options.
Like the high dose of oral hormonal contraceptive, an IUD blocks the implantation of the fertilized egg in the uterine wall. Emergency IUD insertion does slightly increase the risk of pelvic inflammatory disease (PID).
An added advantage of emergency contraceptive use of an IUD compared to pills is that once the IUD is in place, it will provide the woman with a long-term contraceptive method if she chooses.
Medically reviewed by Steven Nelson, MD; Board Certified Obstetrics and Gynecology
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