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  • Title: A prospective double blind trial investigating impact of vaginal pH on efficacy of prostaglandin gel for cervical ripening and course of labour.
    Author: Singh U, Mehrotra S, Gupta HP, Dhakad A, Jain V.
    Journal: J Obstet Gynaecol; 2011; 31(3):217-9. PubMed ID: 21417643.
    Abstract:
    This prospective, double blind investigation was carried out to see the effect of vaginal pH on the efficacy of prostaglandin gel (PGE2) for cervical ripening and course of labour. A total of 45 pregnant women with indications for induction of labour were allocated to two groups: a low vaginal pH (≤5.5, n = 20) and high vaginal pH (>5.5, n = 25) group. All women received prostaglandin E2 gel (0.5 mg in 2.5 ml) intravaginally with repeated dosing if needed, 6 h apart, maximum of three doses. Bishop's score change over 18 h differed significantly between the two groups (p = 0.037). There was no significant difference between the groups with respect to time to onset of labour (9.65±6.29 vs 6.76±3.94, p = 0.066), time to active labour (15.38±9.49 vs 14.30±5.85, p = 0.664), time to complete cervical dilation (18.27±13.85 vs 18.34±6.45; p = 0.984), and time to overall delivery (21.52±9.66 vs 19.39±6.45, p = 0.381).
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