In recent year, there were various types of contraceptives developed having different mode of action. These contraceptives are prepared from natural as well as synthetic sources. These contraceptives worked by prevent the fusion of sperm into ovum, change female hormonal levels and spermicidal activity. Many compounds with different pharmacological activity have been evaluated in vitro for thei...

1. What exactly are injectable contraceptives, specifically DMPA and NET-EN? DMPA, or depot medroxyprogesterone acetate, and NET-EN, short for norethisterone enanthate, are contraceptives that contain a kind of hormone called progestin. Both are given by injection. DMPA (widely known by its marketed name Depo-Provera) is administered every three months, while NET-EN (or Noristerat) is given eve...

In this week’s issue of The BMJ, Vinogradova and colleagues (doi:10.1136/bmj.h2135) report the results of a large study on the effects of combined oral contraceptives on the risk of venous thromboembolism, conducted in two large United Kingdom databases: the Clinical Practice Research Datalink (CPRD) and QResearch. The authors identified over 10 500 cases of VTE in women aged 15-49 years and ar...