NCT00476021 - Clinical Trial References

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

Citation(s)

Chen BA, Reeves MF, Creinin MD, Schwarz EB
Postplacental or delayed levonorgestrel intrauterine device insertion and breast-feeding duration. Contraception. 2011 Nov;84(5):499-504. doi: 10.1016/j.contraception.2011.01.022. Epub 2011 Apr 16.
Chen BA, Reeves MF, Hayes JL, Hohmann HL, Perriera LK, Creinin MD
Postplacental or delayed insertion of the levonorgestrel intrauterine device after vaginal delivery: a randomized controlled trial. Obstet Gynecol. 2010 Nov;116(5):1079-87. doi: 10.1097/AO

Randomized Trial of Postplacental or Delayed Insertion of the Levonorgestrel-releasing Intrauterine Device After Vaginal Delivery

Clinical trial NCT00476021 - References