Conception probabilities at different days of menstrual cycle in Chinese women.

Objective: To investigate the conception probability among Chinese women.

Design: Prospective observational study.

Setting: Clinics in hospitals and family planning institutes in 10 provinces and cities.

The 'frameless' intrauterine system for long-term, reversible contraception: a review of 15 years of clinical experience.

Aim: The development of the 'frameless' intrauterine system (IUS) is a response to the growing need to develop high-performing, long-acting, reversible, and acceptable contraceptives with a high continuation of use.

Methods: This is a review of 15 years of clinical experience in randomized controlled and non-randomized clinical trials.

Results: The IUS has a similar failure rate as the TCu380A Intrauterine device (IUD), considered the 'golden standard' IUD, which is attributed to the optimal target delivery of the copper ions in the upper part of the uterine cavity.

The GyneFix implant systems for interval, postabortal and postpartum contraception: a significant advance in long-term reversible contraception. International Study Group on Intrauterine Drug Delivery.

Intrauterine contraception has a number of important advantages over other forms of contraception and remains, therefore, an important method of birth control. However, side-effects and other drawbacks have reduced its overall acceptance. Also misconceptions and lack of updated scientific knowledge among the potential users and providers are major obstacles to the widespread use of intrauterine contraception.