Normative data of cervical length in singleton pregnancy in women attending a tertiary care hospital in eastern India.

Background & objectives The length of cervix predicts the risk of preterm delivery. The objective of this study was to assess cervical length in pregnancy by transvaginal ultrasonography for generating normative data for nulliparous women at no special risk of preterm labour. Methods An observational study was carried out in a tertiary care teaching hospital in eastern India in nulliparous women who delivered at term. A single sonologist assessed 224 women (once per subject) between 20 and 34 wk of gestation. Nulliparous women carrying a single foetus of confirmed gestational age were included; 216 subjects were finally considered for generation of normative data, excluding those delivering earlier than 37 or later than 42 wk. Other exclusion criteria were history of cerclage, any previous cervical surgery, smoking, or any medical disorder complicating pregnancy. Results Cervix length at each week of gestation gradually decreased over the study period. Length at 20 and 34 wk was 40.5 ± 1.14 mm (mean ± SD) and 34.8 ± 1.34 mm respectively. The overall shortening over this 14 wk period was 5.7 mm, with 0.58 mm per week median rate of shortening. Pearson's correlation coefficient was - 0.69 (95% CI - 0.75 to - 0.60; P< 0.001) for cervical length vis-à-vis gestational age. Interpretation & conclusions The serial normative data generated in our setting can be used to decide cut-off points for predicting risk of preterm labour in future studies. Validity of such prediction needs to be tested in larger cohorts of women assessed at specific gestational ages.

Changing trends in the management of eclampsia from a teaching hospital.

Eclampsia is a major source of both maternal and perinatal mortality. In the management of eclampsia, the role of magnesium sulphate as anticonvulsant and early delivery are well established. The present study is an analysis of maternal and perinatal outcomes after the introduction of magnesium sulphate and liberalisation of caesarean section over a period from August 2002 to September 2004. The observations were compared with statistics from the same hospital from 1995-1997. The incidenceof eclampsia has remained relatively constant but postpartum cases of eclampsia have increased. The case fatality rate of eclampsia has fallen from 11.3% to 5.3%. The perinatal mortality has also fallen from 54.8% to 24.3%. The caesarean section rate for eclampsia has increased from near 10% to 49.7%. Both maternal mortality and perinatal mortality are lowest in the caesaean section group. But the improved perinatal salvage in caesarean section babies may partially reflect the tendency to avoid caesarean section in gross prematurity. The ideal anaesthesia for eclampsia remains unknown but the results with use of general anaesthesia in all cases with precautions produced favourable results.