Contraception with NORPLANT implants

Area of Science:

• Reproductive Health
• Contraception
• Endocrinology

Background:

• NORPLANT is a progestogen-only implant providing long-term contraception.
• It offers reversible protection with a return to normal fertility after removal.
• Levonorgestrel release from the implant is highest initially and decreases over time.

Purpose of the Study:

• To evaluate the effectiveness and side-effect profile of NORPLANT contraception.
• To assess the impact of body weight on drug concentrations and pregnancy rates.
• To determine the acceptability and long-term usability of NORPLANT implants.

Main Methods:

• Analysis of drug release rates from NORPLANT implants.
• Monitoring of circulating levonorgestrel concentrations in users.
• Tracking of pregnancy rates and side-effect occurrences in relation to duration of use and body weight.

Main Results:

• NORPLANT demonstrates effective pregnancy prevention, with failure rates lower than oral contraceptives, even in heavier women.
• Initial side effects, such as menstrual pattern disruption (70-80%), decrease with extended use.
• Reduced menstrual blood loss and increased hemoglobin levels were observed; common side effects include headache, acne, and mood changes.

Conclusions:

• NORPLANT implants provide a convenient, effective, and long-acting reversible contraceptive method.
• Its favorable side-effect profile and high acceptability support its use in diverse populations.
• The method's effectiveness and safety contribute to its global acceptance in both developing and developed countries.