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  • Title: [Sonographically detectable changes in placental structures in pregnancy. 2. Statistical comparison of the frequency distribution of placenta stages 0-3 newborn infants with a birth weight of 2,500-3,999 grams].
    Author: Lückert G, Löffler F, Domke N, Kamin G.
    Journal: Zentralbl Gynakol; 1985; 107(1):35-7. PubMed ID: 3885630.
    Abstract:
    1200 examinations of sonographical demonstrable placental ripeness were done in 552 pregnant women. The frequency of stages 0 to 3 as compared with aid of O. Bunke's confidence intervals. Stage 0 were found frequently until the 30. week of pregnancy, stage 1 between the 21. and 36. gestational week, stage 2 between the 33. and 38. week of pregnancy and stage 3 between the 35. and 40. week. The comparison of the areas of unsharpness several stages possibly may give informations about the period of pregnancy when the stages coincide.
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