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Effects of preeclampsia on maternal and cord blood clotting activity
Insights
Preeclampsia affects neonatal clotting. Infants born to mothers with preeclampsia show abnormal fibrinogen and clotting factor levels, suggesting impaired liver function rather than vitamin K deficiency.
Area of Science:
- Obstetrics and Gynecology
- Neonatal Medicine
- Hematology
Background:
- Preeclampsia is a serious pregnancy complication.
- Neonatal clotting disorders can arise from various factors.
Purpose of the Study:
- To investigate the impact of preeclampsia on maternal and cord blood clotting parameters.
- To differentiate the causes of abnormal neonatal clotting in preeclampsia.
Main Methods:
- Plasma analysis of clotting parameters including prothrombin time, partial thromboplastin time, fibrinogen, and specific clotting factors (II, V, VII, VIII, IX, X, XII).
- Comparison of clotting profiles between neonates from preeclamptic mothers and control groups.
Main Results:
- Neonates from preeclamptic mothers exhibited elevated fibrinogen levels.
- Decreased clotting activity and antigen levels for factor II were observed in neonates of preeclamptic mothers.
- Reduced activity of clotting factors V and VII was noted in the cord blood of infants from preeclamptic pregnancies.
Conclusions:
- Abnormal neonatal clotting parameters in preeclampsia may stem from impaired maternal or fetal liver function.
- The findings challenge the traditional view that vitamin K deficiency is the primary cause of these neonatal clotting abnormalities.
Abstract:
This study was undertaken to evaluate the effect of preeclampsia on maternal and cord blood clotting parameters. Pregnant controls and preeclamptics plus their offspring had plasma analyzed for prothrombin time, partial thromboplastin time, fibrinogen, and clotting activity for factors II, V, VII, VIII, IX, X, XII, plus factor II antigen. Maternal data was consistent with that previously reported by numerous authors. The cord blood data showed that neonates of the preeclamptic mother had elevated fibrinogen and decreased II, V and VII activity, plus decreased II antigen. The data indicates that abnormal clotting parameters seen in the neonates from preeclampic mothers may result from impaired liver function and not as previously thought, from a deficiency in neonatal vitamin K.