Key result
Antithrombin deficiency was associated with a 60.37-fold increased risk of intrauterine growth restriction compared to pregnant women without the mutation.
Why the study?
Because prothrombotic disorders may compromise uteroplacental circulation, it was postulated that maternal thrombophilia might be a risk factor for preeclampsia and intrauterine growth retardation.
Does maternal inherited thrombophilia increase the risk of intrauterine growth restriction and preeclampsia in pregnant women?
Cohort (n=459)
No
Does maternal inherited thrombophilia increase the risk of intrauterine growth restriction and preeclampsia in pregnant women?
Odds Ratio: 60.373 (95% CI 23.561–154.696)
p-value: p=<0.001
Should not yet change screening or anticoagulation practice; leaves open a causal role for antithrombin deficiency in IUGR.
Thrombophilia is a group of genetical disorders that cause blood to clot abnormally. Thrombophilia is linked to recurrent pregnancy loss, foetal growth restriction, late miscarriages, stillbirth and preeclampsia. Clinicians usually apply the term thrombophilia only to patients with atypical thrombosis. A successful outcome of pregnancy requires an efficient uteroplacental circulation. Since this system may be compromised by disorders associated with a prothrombotic state, it was postulated that maternal thrombophilia might be a risk factor for preeclampsia and intrauterine growth retardation. The study included 459 pregnant women with gestational ages ranging from 14 weeks to 28 weeks and the patients in the study were tested for hereditary thrombophilia. The type of thrombophilic mutation most common found was the MTHFR mutation (25.7%), followed by the prothrombin gene mutation (20.9%) and the Leiden factor V mutation (15.7%). Also 15.03% patients had been diagnosed with preeclampsia and 6.75% of the pregnant women had IUGR fetuses.
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Voicu et al. (2020) conducted a cohort in Pregnancy (n=459). Antithrombin deficiency vs. Pregnant women without thrombophilic mutation was evaluated on Intrauterine growth restriction (IUGR) (OR 60.373, 95% CI 23.561-154.696, p=<0.001). Antithrombin deficiency was associated with a 60.37-fold increased risk of intrauterine growth restriction compared to pregnant women without the mutation.
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