Complementemia and obstetric outcome in pregnancy with antiphospholipid syndrome.

OBJECTIVE: To investigate the predictive value of serum C3 and C4 complement component levels in relation to pregnancy outcome in patients with antiphospholipid syndrome (APS). MATERIALS AND METHODS: A prospective study of 47 pregnancies associated with APS was performed. Pregnancy outcome was analyzed in terms of: fetal loss, preterm delivery (≤34 gestational weeks), fetal intrauterine growth restriction (IUGR), birth weight <2500 g and preeclampsia. Week at delivery, neonatal birth weight and neonatal birth weight percentile were also investigated. Hypocomplementemia, positivity for anti-dsDNA and triple positivity for antiphospholipid antibodies (aPL) were related to pregnancy outcome. RESULTS: Forty-three pregnancies ended in live births with a fetal loss rate of 8.5%. Fetal death, preterm delivery and birth weight <2500 g were associated with hypocomplementemia (p = 0.019, p = 0.0002, p < 0.0001 respectively). Lower neonatal birth weight, lower neonatal birth weight percentile and lower week at delivery were associated with hypocomplementemia (p < 0.0001, p = 0.0003, p < 0.0001 respectively) and with triple aPL positivity (p = 0.008, p = 0.014, p = 0.03 respectively). A poor pregnancy outcome was confirmed among primary APS (PAPS) pregnancies with hypocomplementemia. Multivariate analysis confirmed that hypocomplementemia was an independent predictor of lower neonatal birth weight (p = 0.0001) and lower week at delivery (p = 0.002). CONCLUSION: Hypocomplementemia could be considered a novel prognostic factor for pregnancy outcome in APS patients.

PP029. Gestational hypertension and birth weight in twin pregnancies.

INTRODUCTION: It is well known that hypertensive disorders of pregnancy are most frequent in twin pregnancies than in singleton ones. As demonstrated by a previous work of our group, twin pregnancies complicated by preeclampsia are associated with a higher rate of "small for gestational age" (SGA) neonates and inter-twin weight discordance than normotensive ones. OBJECTIVES: The present study investigates the effect of gestational hypertension (GH) on neonatal birth weight, inter-twin weight discordance and growth restriction rate among twin pregnancies. METHODS: A 26 year retrospective study was undertaken by examining 196 twin pregnancies complicated by GH, from January 1, 1980 to December 31, 2006, and comparing them to 912 normotensive twin pregnancies. RESULTS: No significant differences were observed between the two groups in relationship to birth weight, inter-twin weight discordance and growth restriction rate, with a trend towards a higher birth weight in GH group. In normotensive group, the discordance >25% was associated with a lower gestational age at the delivery (p<0.00001). Moreover, the rate of pregnancies with SGA second twin gradually rose while paralleling the degree of discordance. CONCLUSION: Contrary to preeclampsia in twin pregnancies the outcome of those complicated by GH is similar to normotensive ones. The trend towards a higher birth weight in GH seems apparently paradoxical, but it may reflect the role of uncomplicated hypertension in twin pregnancies: the increased blood pressure could be a physiologic response for more blood nutrient supply to the fetuses.

PP158. Hypertensive disorders in pregnant women affected by type I diabetes.

INTRODUCTION: Type I diabetes in pregnancy is associated with an increased incidence of hypertensive disorders. OBJECTIVES: The aim of the present study was to evaluate the incidence of hypertensive disorders in pregnant women affected by type I diabetes and pregnancy outcome in women with and without hypertension. METHODS: One hundred seventy two pregnancies in 150 women affected by type I diabetes were assessed. Twelve pregnancies were excluded (8 because of spontaneous abortions, 1 for voluntary abortion and 3 twin pregnancies), and 160 pregnancies were considered for the study. RESULTS: Twenty-five pregnancies (15.6%) were complicated by hypertensive disorders: 4.4% by chronic hypertension (CH), 5% by gestational hypertension (GH), 4.4% by preeclampsia (PE) and 1.8% by preeclampsia superimposed on chronic hypertension (PE+CH); 32% of the women presented a vascular disease (renal or retinal disease). The diabetic women with hypertensive complications were compared with diabetic women without hypertension. The main results are shown in Table 1. Significant differences in mean birth weight and mean gestational age were found. The group affected by preeclampsia showed 14.7% of small for gestational age (SGA) neonates (birth weight percentile less than 10th pc), and 57.1% of large for gestational age (LGA) neonates (birth weight percentile greater than 90th pc), two of them were over 4000 g. Only one case of very preterm delivery (<32 weeks) was observed in the sample. CONCLUSION: As expected, the incidence of hypertensive disorders in population affected by type 1 diabetes is higher than in general population and a poor pregnancy outcome was observed in this group of women. However, the neonatal outcome of women affected by preeclampsia is not different from that observed in women without hypertensive complications (diabetic controls) in terms of mean birth weight despite a significantly lower mean week gestation at delivery.