Background Evidence on a possible association between newer hormonal contraceptives
(HC) and risk of breast cancer remains inconclusive, especially as concerns progestogen …

Background Little is known about whether contemporary hormonal contraception is
associated with an increased risk of breast cancer. Methods We assessed associations …

Background. Findings on potential interactive effects of oral contraceptives (OCs) and
hormone replacement therapy (HRT) on breast cancer risk have been inconsistent. We …

Background Current or recent use of combined oral contraceptives (containing oestrogen+
progestagen) has been associated with a small increase in breast cancer risk. Progestagen …

Summary Background The Collaborative Group on Hormonal Factors in Breast Cancer has
brought together and reanalysed the worldwide epidemiological evidence on the relation …

Simple Summary Breast cancer (BC) is caused by highly invasive and metastatic malignant
tumors and affects a large number of women, threatening their health and quality of life …

The largest meta-analysis comprised a total of 54 epidemiologic studies (Collaborative
Group on Hormonal Factors in Breast Cancer) and included 53,297 women with breast …

Current use of oral contraceptives (OCs) has been reportedto increase breast cancer risk
slightly. In 1991/1992, a prospective cohort study specifically designed to examine the role …

The recent Danish cohort study reported a 20% increased risk of breast cancer among
current and recent hormonal contraception users. These results are largely consistent with …

Purpose Main aim was to estimate the association between use of exogenous hormones
and breast cancer (BC) risk in a large population-based survey, and to assess the …