Prolonged heparin therapy in pregnancy causes bone demineralization

Area of Science:

• Obstetrics and Gynecology
• Pharmacology
• Bone Metabolism

Background:

• Osteoporosis is a growing concern, particularly in pregnant women.
• Heparin is commonly used for thromboembolism prophylaxis during pregnancy.
• The long-term effects of heparin on bone density in pregnancy are not fully understood.

Purpose of the Study:

• To assess the relationship between heparin therapy and osteoporosis.
• To evaluate the impact of subcutaneous heparin on bone density in pregnant women.

Main Methods:

• Retrospective analysis of 20 women receiving subcutaneous heparin for thromboembolism prophylaxis during and after pregnancy.
• Measurement of phalangeal and metacarpal cortical area ratios.
• Assessment of back pain, lumbar spine radiology, and Singh index.

Main Results:

• Significant reduction in phalangeal cortical area ratio after long-term heparin therapy (>25 weeks) compared to short-term (<7 weeks).
• A similar, though not statistically significant, trend observed in the metacarpal area ratio.
• No correlation found between heparin duration and back pain, spinal radiology, or Singh index.

Conclusions:

• Findings suggest a dose-related demineralization process associated with prophylactic heparin therapy in pregnancy.
• The study highlights the need for critical re-examination of thromboembolism prophylaxis methods and criteria in pregnancy.