Subdermal Implant: our experience in teenagers

Subdermal Implant: our experience in teenagers

A. Pereira, F. Sousa, N. Assunção

Department of Gynaecology, D. Estefnia Hospital, Lisbon, Portugal

Introduction: Subdermal implant containing 68 mg of etonogestrel has

been introduced as a contraceptive method in Portugal for two years. In D.

Estefnia Hospital, a Pediatric Hospital, the department of Gynaecology has a

specific consultation for the teenage population. The objective of this work is

the avaliation of subdermal implant in teenagers.

Design and Methods: in two years (2002 and 2003) we have selected 30

teenage girls for this kind of contraception . This is a retrospective study. We

avaliated: age, obstetric indice, duration of use, prior contraceptive method,

associated pathology, the new menstrual pattern, the change in weight and

secondary side effects.

Results: we avaliated thirty (30) girls with ages varied from 11 to 19

years old. Two girls were lost for follow up. Nearly 60% of these girls have a

child or had been pregnant. The depot medroxyprogesterone acetate was the most

common prior contraceptive method. The more frequent menstrual pattern was

amenorrhoea. Mental retardation with or without neurological handicap was the

most associated pathology (20%); other situations were: talassemia minor, cystic

fibrosis and cronic B hepatitis. The variation in weight was not estatistically

significant. In three girls there were side effects: mastodinia (1 ), increased

hirsutism (1 ) and a case of depression we think was multifactorial. No girl

intended to take off the implant. There were no reported pregnancies.

Conclusion: Subdermal implant seems to be a good contraceptive choice

in this group without impact in bone mass. In girls with a neurological problem

who are incapable of self-care the amenorrhoea associated is one more advantage

of this method.

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