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The placenta in maternal hyperhomocysteinaemia.
1Department of Histopathology, Adelaide Women's and Children's Hospital, Australia.
British Journal of Obstetrics and Gynaecology
|July 30, 1999
Summary
Mild or moderate hyperhomocysteinemia can lead to adverse perinatal outcomes. Investigating placental pathology may reveal this condition, and folic acid supplementation shows promise for improved pregnancy results.
Area of Science:
- Obstetrics and Gynecology
- Perinatal Medicine
- Vascular Biology
Background:
- Mild or moderate hyperhomocysteinemia is increasingly linked to adverse pregnancy outcomes.
- Previous studies suggest a correlation between elevated homocysteine levels and complications such as intrauterine fetal growth restriction, placental abruption, and thromboembolic disease.
Purpose of the Study:
- To review placental pathology in pregnancies complicated by hyperhomocysteinemia.
- To identify specific placental findings associated with maternal hyperhomocysteinemia.
- To evaluate the potential benefit of folic acid supplementation in subsequent pregnancies.
Main Methods:
- Retrospective review of placental pathology in 14 pregnancies from 11 women diagnosed with hyperhomocysteinemia.
- Clinical history included intrauterine fetal growth restriction, abruption, or thromboembolic disease.
- Analysis of placental features such as vascular changes, atherosis, trophoblast invasion, infarction, and villous maturity.
Main Results:
- Most placentas showed abnormal placentation, though findings were not specific to hyperhomocysteinemia or present in all cases.
- Observed features included absent physiological vascular changes, acute atherosis, endovascular trophoblast, infarction, retroplacental hematoma, accelerated villous maturity, and uteroplacental vascular thrombosis.
- Three women with subsequent pregnancies treated empirically with folic acid experienced improved perinatal outcomes.
Conclusions:
- Placental pathology in pregnancies with adverse outcomes warrants investigation for maternal hyperhomocysteinemia.
- Folic acid supplementation may improve perinatal outcomes in pregnancies affected by hyperhomocysteinemia.
- Further randomized controlled trials are needed to confirm the efficacy of folic acid in preventing pregnancy complications associated with hyperhomocysteinemia.