It is compose of hormone which act to suppress the normal process of ovulation or changes the lining of uterus making it unlikely to conceive. Normally it consist of oestrogen (e.g. ethinyloestradiol) with/or without progestrogen (e.g levonogestrel).公仔箱論壇. P0 N5 S5 z/ ^5 P$ K
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發表於 2008-12-17 04:21 PM
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