Valentina Giardini

Seasonal impact in the frequency of isolated spina bifida

To evaluate whether a relationship exists between season at conception and occurrence of isolated spina bifida (ISB).

O4. Predisposing factors for early- and late-onset preclampsia.

Objectives: Early (34.0 wks) and late (>34.0 wks) onset preeclampsia (EO–LO PE) are supposed to have different etiologies, vascular and inflammatory disfunction respectively. The aim of our study is to evaluate general characteristics of women affected by either EO or LO PE, to identify risk factors for the two forms of disease. Study design: Retrospective cohort study of 197 consecutive singleton women diagnosed as preeclamptic at 22.4– 41.4 wks, from 1/2005 to 9/2009, evaluating demographic, clinical, and ultrasonographic (US) variables on hospital admission, in relation to EO vs LO PE. HELLP syndrome and stillbirth cases, and fetus with congenital anomalies were excluded. Obesity was defined as a BMI 30 kg/m2. First abnormal uterine arteries (UtA) Doppler, evaluated in women with history of APO (previous PE/IUGR/SGA), was defined as mean RI > 0.58 or bilateral Notch within 26.0 wks. IUGR was considered as an US AC 35 yrs and UtA Doppler related to EO PE (Table 2), whereas WG > 12 kg to LO PE (p = 0.04; OR = 4.6, CI (95%) = 2.39–8.87). Conclusions: Age > 35 yrs and UtA Doppler appeared risk factors for EO PE, whereas WG > 12 kg for the late form, supporting the hypothesis of a different pathogenesis.