title: One year study of Implanon on the adverse events and discontinuation.
abstract: OBJECTIVE
  To determine adverse events and discontinuation of Implanon in healthy Thai women between 16 and 45 years of age.
  
  
  METHODS
  Prospective descriptive study.
  
  
  METHODS
  Family Planning Unit, Department of Obstetrics and Gynecology, Faculty of Medicine, Chiang Mai University.
  
  
  METHODS
  Ninety-two female volunteers with eligible criteria, no contraindication for hormonal contraceptive and wished to have long-term contraception were recruited.
  
  
  METHODS
  Determination of adverse events was done three months after Implanon insertion. Discontinuation of Implanon use was reviewed during the study period of one year
  
  
  RESULTS
  Amenorrhea (40.2%) and infrequent bleeding (39.1%) were the most menstrual adverse events. While most non-menstrual adverse events were headache/dizziness (27.2%) and lower abdominal pain (23.9%). Severe non-menstrual side effect was rare (1-2%). Seven subjects (7.6%) discontinued using Implanon during the one year period of study.
  
  
  CONCLUSIONS
  Implanon demonstrated a high continue rate at the first year of insertion. It produced similar adverse events like other progestin-only contraceptives. Counseling before insertion is important for increased client satisfaction and a higher continuation rate.
authors.affiliation: Department of Obstetrics and Gynecology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.
authors.forename: Somsak
authors.initials: S
authors.lastname: Chaovisitsaree
authors.forename: Wirawit
authors.initials: W
authors.lastname: Piyamongkol
authors.forename: Saipin
authors.initials: S
authors.lastname: Pongsatha
authors.forename: Nuntana
authors.initials: N
authors.lastname: Morakote
authors.forename: Supranee
authors.initials: S
authors.lastname: Noium
authors.forename: Nuchanart
authors.initials: N
authors.lastname: Soonthornlimsiri
mesh_terms: D000293:Adolescent; D000328:Adult; D003271:Contraceptive Agents, Female / Q000009:adverse effects*; D017135:Desogestrel / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008875:Middle Aged
chemical_list: D003271:Contraceptive Agents, Female; C044815:etonogestrel; D017135:Desogestrel