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Implantable contraception.

Abstract
This article reviews the advantages and disadvantages of progestogen-only contraceptive implants in light of the development of Implanon, a new, single-rod, etonogestrel-releasing system. Implants rapidly produce serum progestogen levels sufficient to ensure contraception for 1-5 years. The steady release ofprogestogen avoids the peaks and troughs associated with oral contraceptives, the profound ovarian suppression observed with depot injections and the need for user compliance. Implants have few serious complications. Ectopic pregnancy rates are low, and follicular hypertrophy is generally self-limiting. The principal acceptability limitation to both users and providers of Norplant is insertion and removal. Implanon is easy to insert and remove with minimal complications and pain. The main adverse event causing discontinuation of implants is a change in bleeding pattern. However, with good counselling, this is well tolerated by most women. Implants thus provide an effective, safe, economical and convenient alternative to oral, injectable or intrauterine contraceptives. Implanon is an extremely effective single-rod implant with a Pearl index of 0. It employs a new polymer and a less androgenic progestogen. These features provide easier insertion and removal for both users and clinicians, a more stable release rate and potentially fewer adverse androgenic effects compared with existing formulations.
AuthorsP D Darney
JournalThe European journal of contraception & reproductive health care : the official journal of the European Society of Contraception (Eur J Contracept Reprod Health Care) Vol. 5 Suppl 2 Pg. 2-11 (Sep 2000) ISSN: 1362-5187 [Print] England
PMID11246603 (Publication Type: Journal Article, Review)
Chemical References
  • Contraceptive Agents, Female
  • Progesterone Congeners
  • Vinyl Compounds
  • etonogestrel
  • Desogestrel
Topics
  • Contraceptive Agents, Female
  • Desogestrel
  • Female
  • Humans
  • Patient Satisfaction
  • Progesterone Congeners
  • Vinyl Compounds

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