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There is a non-statistically significant increased rate of breast cancer for hormone replacement therapy with synthetic progestogens. [6] The risk may be reduced with bioidentical progesterone, [61] though the only prospective study that suggested this was underpowered due to the rarity of breast cancer in the control population.
The effects of hormonal birth control on breast cancer risk have been studied for decades. Many studies over the years have shown that hormone-containing birth control options, specifically ...
A 2013 meta-analysis concluded that every use of birth control pills is associated with a modest increase in the risk of breast cancer (relative risk 1.08) and a reduced risk of colorectal cancer (relative risk 0.86) and endometrial cancer (relative risk 0.57).
This is an accepted version of this page This is the latest accepted revision, reviewed on 16 February 2025. Cancer that originates in mammary glands Medical condition Breast cancer An illustration of breast cancer Specialty Surgical oncology Symptoms A lump in a breast, a change in breast shape, dimpling of the skin, fluid from the nipple, a newly inverted nipple, a red scaly patch of skin on ...
Studies have suggested for decades that birth control pills containing both estrogen and progestogen — synthetic versions of female hormones — may slightly elevate one’s risk of breast cancer.
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They concluded that: "Overall, there was no evidence of an increased risk of breast cancer". [53] Recent anxieties about the contribution of progestogens to the increased risk of breast cancer associated with HRT in postmenopausal women such as found in the WHI trials [54] have not spread to progestogen-only contraceptive use in premenopausal ...
Low-dose oral estradiol valerate (2–6 mg/day) has been used in the treatment of breast cancer in women who were previously treated with and benefited from but acquired resistance to aromatase inhibitors as well. [33] [34] Injectable estradiol valerate has been used to suppress sex drive in sex offenders. [35]