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progestational adj.【化學】孕酮的,孕激素的。

progesterone

The bases of prophylactic is estrogen and progestational hormone , take for a long time can throw into confusion endocrine balance of the female , cause menstruation to be not moved , can make bust smaller and smaller only so 避孕藥的主要成分是雌激素和孕激素,長期服用會打亂女性的內分泌平衡,造成月經不調,這樣只會使胸部越來越小。