Downlo kground: Oral contraceptive formulations have changed over time, making it relevant to assess the of more recent formulations on breast cancer risk. In addition, some studies have found stronger posisociations of oral contraceptive use with estrogen receptor–negative (ER) than with ER-positive (ER) cancer. We carried out the first assessment of the effect of oral contraceptive use on the...

Oral contraceptive use is the most common type of contraception. More than 300 million women worldwide take oral contraceptives every day. However, there is a concern about the relationship with the incidence of cancer. This analytical retrospective study aimed to investigate the relationship between the incidence of cervical and breast cancers and oral contraceptive use in 128 Iranian patients...

Key Points A number of studies suggest that current use of oral contraceptives (birth control pills) appears to slightly increase the risk of breast cancer, especially among younger women. However, the risk level goes back to normal 10 years or more after discontinuing oral contraceptive use. Women who use oral contraceptives have reduced risks of ovarian and endometrial cancer. This protective...

Little is known about the etiologic profile of triplenegative breast cancer (negative for estrogen receptor/ progesterone receptor/human epidermal growth factor), a breast cancer subtype associated with high mortality and inadequate therapeutic options. We undertook this study to assess the risk for triple-negative breast cancer among women 45 years of age and younger in relation to demographic...

OBJECTIVE To measure the association between oral contraceptive use and the prevalence of genital warts in women. METHODS Cross sectional case control study comparing oral contraceptive use in women with and without genital warts attending a city centre genitourinary medicine clinic controlling for recent sexual activity, the presence of other sexually transmitted infections, socio-economic c...

A prospective study was undertaken to evaluate the relative contribution of changes in sympathetic nervous system activity, as reflected by changes in dopamine-beta-hydroxylase (DBH) activity, to the pathogenesis of oral contraceptive-induced hypertension. Precontraceptive and serial post contraceptive determinations of blood pressure, plasma renin activity (PRA), DBH activity, and changes in b...

Background Depot medroxyprogesterone acetate (DMPA) contraceptive use is associated with an increased risk for Chlamydia infection. However, prior studies inadequately account for potential differences in sexual behavior between users of DMPA and users of other contraceptive methods. In this study we compare sexual risk-taking behavior in women using DMPA to women using oral contraceptive pills...

INTRODUCTION In Nigeria about 50% of oral contraceptive pill users obtain their products from proprietary patent medicine vendors (PPMVs). This group of service providers are poorly trained and have very limited knowledge about contraception. This paper investigated the nature of the advice offered to simulated current and potential users of oral contraceptive pills. The main objective was to a...

OBJECTIVE To estimate the incidence of venous thromboembolism, acute myocardial infarction, and ischemic stroke among transdermal contraceptive system users compared with users of norgestimate-containing oral contraceptives with 35 mcg ethinyl estradiol. METHODS We began with insurance claims data from UnitedHealthcare. We identified women exposed to the transdermal contraceptive system or no...