The researchers found small but significant increases in several harmful effects in women who took the hormones.
研究者在服用激素的妇女组中发现很小的但是显著的很多有害反应的增加。
The study noted that 21 out of 23 retrospective studies have shown an increased risk of breast cancer in women who took oral contraceptives prior to pregnancy.
此研究特别提及23项回顾性研究中的21项已显示孕前使用口服避孕药的女性患乳腺癌的风险增加。
In one study, use of birth control pills led to a higher risk of premenopausal breast cancer in women who took the pill for four or more years before having a baby.
一项研究显示,在生育前使用口服避孕药达10年或以上,可导致绝经前乳腺癌风险增加。
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