A Proposal of a Prospective Study on Prevention of Pregnancy Loss in Women Carrying Inherited Thrombophilia
试验速览
- 阶段
- 不适用
- 发起方
- 入组人数
- 108
- 试验地点
- 1
- 主要终点
- Number of live births
研究概览
简要总结
The occurrence of a spontaneous fetal loss (FL) is a rather frequent event: it has been estimated that up to 15% of pregnancies result in a fetal loss. However, recurrent events, defined as >2 or >3 loss, depending on the guidelines used (American College of Obstetricians and Gynecologists or Royal College of Obstetricians Gynaecologists guidelines), occur in 1 % of all pregnancies and it is noteworthy that Recurrent Fetal Loss ( RFL) in about 30-40% of cases remain unexplained after standard gynaecological, hormonal and karyotype investigations. Furthermore, it is important to consider that chromosomal abnormalities are responsible for at least 60% of FL in the first trimester, thus an abnormal karyotype in the fetus should be excluded prior to consider testing women for genetic susceptibility to placental vascular complications (inherited thrombophilia).
Common inherited conditions, the factor V Leiden (FV) and the factor II G20210A (FII) mutations have been recognized as risk factors for FL.
The efficacy of treatment with antithrombotic drugs during pregnancy in women with a history of RFL/ Intra Uterine Fetal Death (IUFD) and thrombophilia is still debated, due to scarcity of available data. Italian guidelines suggest the use of Low-Molecular-Weight Heparin (LMWH) in women with FV or FII mutations and previous otherwise unexplained obstetric complications, while guidelines released by RCOG suggest that heparin therapy during pregnancy may improve the live birth rate in women with second trimester loss associated with inherited thrombophilias. Hence, the idea to propose this prospective observational study comparing clinical data and outcomes in women with common inherited thrombophilias and in women without.
During this study the investigators will collect and evaluate clinical data from examinations and visits by patients, eligible for the study as carriers of thrombophilic defects. This observation will begin before pregnancy and continue until the puerperium, allowing us to study all possible factors influencing these conditions. The study will add knowledge for improving feto-maternal prognosis and preventing spontaneous and recurrent FL.
Plan of the study: multicenter observational study
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 45 Years（Adult）
- 性别
- Female
- 接受健康志愿者
- 否
入选标准
- •recurrent otherwise unexplained FL (defined as >3, or 2 in the presence of at least 1 normal fetal karyotype) (according to Lussana et al.) or
- •at least 1 intrauterine fetal death (IUFD), defined as a loss after 20 weeks of a morphologically normal fetus with/without HETEROZYGOUS FOR FACTOR V LEIDEN or HETEROZYGOUS FOR FIIA20210 (PTm)
排除标准
- •personal history of venous and/or arterial thromboembolism;
- •documented hemorrhagic disease;
- •allergy to LMWH;
- •uterine abnormalities;
- •cervical incompetence;
- •untreated endocrine diseases (diabetes mellitus or thyroid disease);
- •indication to anticoagulant treatment during pregnancy;
- •chromosomal abnormalities in parents
研究组 & 干预措施
Inherited Thrombophilia
Women with Common Inherited Thrombophilias and previous foetal loss
干预措施: Low Molecular Weight Heparins (LMWHs) (Drug)
Other Thrombophilias with Pregnancy loss
Women with Thrombophilias other than common inherited thrombophilias and previous foetal loss
干预措施: Low Molecular Weight Heparins (LMWHs) (Drug)
No thrombophilia
Women without thrombophilias and previous foetal loss
干预措施: Low Molecular Weight Heparins (LMWHs) (Drug)
结局指标
主要结局
Number of live births
时间窗: 10 months
次要结局
未报告次要终点
研究者
Elvira Grandone, MD, Head of Unit
A proposal of a prospective study on prevention of pregnancy loss in women carrying inherited thrombophilia.
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