Objectives: The aim of this study was to assess the predictive value of serum progesterone levels in early pregnancy prognosis in spontaneous dichorionic-diamniotic twin gestations.
Study design: This study was carried out among 38 spontaneous dichorionic-diamniotic twin gestations between January 2003 and June 2005 in the Department of Obstetrics and Gynaecology at the Gulhane Military Medical Academy. Serum progesterone levels were measured at 7 and 10 weeks' gestation and pregnancies were followed until 14 gestational weeks by ultrasound examination.
Results: We found that a progesterone level of 58 nmol/l in the 7th gestational week and of 51 ng/ml at 10 gestational weeks has a predictive value for viable intrauterine twin pregnancies with 83% sensitivity and 69% specificity and 83% sensitivity and 84% specificity, respectively.
Conclusion: Progesterone levels in the early gestational weeks may be a biochemical marker for the prediction of a twin pregnancy outcome and may reduce the number of ultrasound examinations.