Chinese experience with intrauterine devices.

Area of Science:

• Reproductive Health
• Medical Device Technology
• Contraception

Background:

• Intrauterine devices (IUDs) are a key component of reproductive health strategies.
• The evolution of IUD technology in China has focused on enhancing contraceptive efficacy and expanding applications.
• Past IUDs, like the stainless steel ring, have been largely replaced by more effective copper-bearing devices.

Purpose of the Study:

• To review the advancements and changes in intrauterine device (IUD) utilization for contraception in China over the past 10 years.
• To evaluate the efficacy and applications of various copper-bearing IUDs, including those developed domestically.
• To assess the role of IUDs in emergency contraception and the management of menorrhagia.

Main Methods:

• Review of scientific literature and clinical studies on IUDs used in China.
• Analysis of IUD designs, focusing on copper-bearing models like TCu380A, TCu220C, MLCu375, UCu300, and gamma Cu380 IUD.
• Examination of data regarding the effectiveness of IUDs for emergency contraception and treatment of heavy menstrual bleeding.

Main Results:

• Copper-bearing IUDs have become standard, significantly improving contraceptive efficacy compared to older inert devices.
• Specific IUD models like TCu380A, TCu220C, and MLCu375 are widely used, alongside Chinese-developed UCu300 and gamma Cu380 IUDs.
• MLCu375 and TCu380A demonstrate over 96% effectiveness for emergency contraception.
• Levonorgestrel-releasing IUDs offer dual benefits for contraception and treating menorrhagia.

Conclusions:

• The shift to copper-bearing IUDs represents a major improvement in contraceptive technology in China.
• Modern IUDs are highly effective for both routine contraception and emergency situations.
• Levonorgestrel-releasing IUDs provide a valuable therapeutic option for women experiencing heavy menstrual bleeding alongside a need for contraception.