恒峰娱乐高恒峰娱乐美女荷官网站：为什么会痛经

　　月经期或月经期前后出现下腹部剧烈疼痛以致影响工作、学习和健康者称为痛经。　　痛经可分成为原发性，恒峰娱乐高恒峰娱乐美女荷官网站：即从月经初潮就发生痛经；还有继发性痛经，即月经初潮时无痛经，而在以后出现的痛经。原发性痛经多是由于子宫发

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