Study on Association of Serum Magnesium with Preterm Labour

Background: Magnesium plays an import role in the physiology of parturition. Decrease of Magnesium in plasma may be responsible for a decrease of the same in myometrium and this might have a considerable influence on the preterm labour. A Hypomagnesaemia leads to neuromuscular irritability leading to uterine hyperactivity which leads to cervical dilation. Objective: To find out the association between serum magnesium and preterm level. Methods: This was a cross sectional study, conducted in 100 women in labour, of them 50 were diagnosed case of preterm labour and 50 women were in labour at term attended in Gynaecology and Obstetrics department of Dhaka Medical College, Dhaka, from January 2015 to December 2015.5ml fasting blood sample was collected and was analyzed for serum magnesium using a standard enzymatic method. The mean value of serum magnesium was compared between two groups by student unpaired t-test and serum magnesium level was correlated with BMI, Gravita and gestational age in preterm labour patients by Pearson’s correlation coefficient test. A p-value was considered to be statistically significant at 0.05 at a 95% confidence interval. Results: The mean age was found 28.2±4.5 years in group I and 26.7±4.1 years in group II. The mean age difference was not statistically significant (p>0.05) between two groups. A majority (80.0%) of the patients came from a middle-class family in group I and 29(58.0%) in group II. The mean BMI was found 23.0±3.8 kg/m2 in group I and 26.4±2.4 kg/m2 in group II. The socioeconomic status and BMI were statistically significant (p<0.05) between two groups. The mean serum magnesium was found 1.64±0.13 mg/dl in group I and 2.05±0.11 mg/dl in group II. The mean serum magnesium level was significantly (p<0.05) lesser in group I. Serum magnesium had an area under curve 0.974, which gave a cut-off value < 1.8 mg/dl, with 98.0% sensitivity and 88.0% specificity for prediction of preterm labour. Conclusion: Most of the patients were belonged to age 21-30 years in both groups are not associated. A negligible correlation was found with BMI, gravid, through serum magnesium in preterm labour. Low serum magnesium level was significantly higher in preterm labour.