Let’s talk about the method of the study Fifty-eight healthy women were assigned to receive 3 cycles of contraceptive patch (ethinyl estradiol 20 µg and norelgestromin 150 µg /day). All participants aged 16-20 years were invited to participate from the family planning clinic at King Chulalongkorn Memorial Hospital. Data were collected on adverse effects, perceived advantages and disadvantages, body weight, blood pressure, patch detachments and compliance. Data were analyzed using mean, percentage and student’s t-test.
healthy women aged 16-20, who were sexually active and at risk of pregnancy, had regular menstrual cycles and at least one normal menstrual cycle, body weight less than 90 kg and no use of any other steroid hormonal therapy at least 3 months before beginning the present study. Exclusion criteria included pregnancy and lactation, any acute or chronic liver disease, history of significant cardiovascular, hepatic, renal or thromboembolic disease, hypertension > 140/90 mmHg, metabolic disturbance or any malignant tumor, history or presence of dermal hypersensitivity, undiagnosed abnormal uterine bleeding, active cigarette smoking,and alcohol or drug abuse.