Thiết bị ngừa thai hiệu lực lâu hơn mong đợi
(TT) - Phân tích mới đây từ các nhà khoa học ở New York (Mỹ) cho rằng các thiết bị ngừa thai cấy dưới da hoặc cấy trong tử cung có thể kéo dài hiệu lực thêm ba năm sau khi hết hạn sử dụng dựa vào khuyến cáo từ nhà sản xuất.
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