Coagulation studies in Asian women using injectable progestogen for contraception

Area of Science:

• Reproductive endocrinology
• Hematology
• Pharmacology

Background:

• Depot medroxyprogesterone acetate (DMPA) is a widely used progestin contraceptive.
• Previous studies on DMPA's effects on coagulation and fibrinolysis have yielded varied results, particularly concerning ethnic differences.
• Understanding these effects is crucial for assessing the safety and efficacy of DMPA in diverse populations.

Purpose of the Study:

• To investigate the impact of long-term depot medroxyprogesterone acetate (DMPA) use on coagulation, fibrinolytic activity, and platelet function in Asian women.
• To compare these hemostatic parameters between Asian women using DMPA and matched controls.
• To explore potential ethnic-specific responses to DMPA regarding hemostasis.

Main Methods:

• A cohort of 104 Asian women volunteers received 150 mg intramuscular DMPA every three months for at least two years.
• Coagulation factors, fibrinogen levels, prothrombin time, and euglobulin clot lysis time (ECLT) were measured.
• Results were compared to those of carefully matched control subjects.

Main Results:

• Coagulation factors showed minimal changes.
• Fibrinogen levels were elevated, and prothrombin time was shortened in the DMPA group.
• Fibrinolytic activity, assessed by ECLT, was significantly increased in Asian women using DMPA.
• This increase in fibrinolytic activity contrasts with findings in Caucasian women.

Conclusions:

• Long-term DMPA use in Asian women is associated with a significant increase in fibrinolytic activity.
• The observed hemostatic changes, particularly enhanced fibrinolysis, may be specific to Asian women.
• These findings suggest a potential ethnic variation in the hemostatic response to depot medroxyprogesterone acetate, possibly indicating an increased fibrinolytic potential in Asian women.