EE: Ethinyl estradiol; LNG: Levonorgestrel; OC: Oral contraceptive; RR: Relative risk; VTE: Venous thromboembolism. Transdermal contraceptive patches provide a more convenient delivery system for ...
WASHINGTON -- Federal health officials approved sale of the world's first contraceptive patch yesterday, giving women an option considered as safe and effective as the pill but easier for some to use.
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