Pill method failures in women seeking abortion: fourteen years experience.
N Z Med J
; 111(1075): 386-8, 1998 Oct 09.
Article
en En
| MEDLINE
| ID: mdl-9830420
ABSTRACT
PIP: Predisposing factors to oral contraceptive (OC) failure in reliable pill takers were investigated in a survey of 769 women who presented to Wellington (New Zealand) Hospital in 1981-95 for induced abortion. More than one predisposing factor was found in the majority of cases of pill failure. The highest percentage (37%) of pill failures occurred in women 20-24 years of age. The most common risk factor was diarrhea and/or vomiting, present around the time of conception in 39% of women. Another 21% took antibiotics during this period. Menstrual disturbance prior to the pregnancy occurred in 37.1%--a rate higher than that expected from studies of pill use. A history of previous pill failure was present in 27.8%. Smoking was a risk factor in users of combined OCs. 33.7% of women using the progestogen-only pill and 34.2% of combined OC users were under severe stress at the time pregnancy occurred. As expected, progestogen-only pill users experienced a higher rate of failure relative to the market share, but excess weight and the time of pill taking were not risk factors. These findings suggest a need for careful counseling about the potential of gastrointestinal illness and interacting medications to compromise pill effectiveness.
Palabras clave
Abortion Seekers; Abortion, Induced; Biology; Contraception; Contraception Failure; Contraceptive Methods; Contraceptive Usage; Developed Countries; Family Planning; Fertility Control, Postconception; New Zealand; Oceania; Oral Contraceptives; Research Methodology; Research Report; Risk Factors; Sampling Studies; Studies; Surveys
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Embarazo
/
Fumar
/
Aborto Inducido
/
Anticonceptivos Hormonales Orales
Tipo de estudio:
Etiology_studies
/
Risk_factors_studies
Límite:
Adult
/
Female
/
Humans
/
Middle aged
Idioma:
En
Revista:
N Z Med J
Año:
1998
Tipo del documento:
Article
Pais de publicación:
Nueva Zelanda