Comparative study regarding effect of pH on Misoprostol in induction of labor in full term primigravida pregnant women, a double blind randomized controlled trial
-
Ahmed S. S. A. Rashwan
, Mohamed el-sharkawy
Abstract
Objectives
To evaluate the effect of altering vaginal pH on induction of labor in full-term pregnancies using Misoprostol.
Methods
This randomized controlled trial was conducted at Kasralainy Hospital, Cairo University, Egypt and Algezeera Hospital, Egypt. A total of 218 healthy term primigravida pregnant women who were scheduled for pregnancy termination were recruited in the study. The included patients were divided into three groups; Group A: Those who received normal saline vaginal wash (0.9% NaCl), Group B: those who received alkaline vaginal wash (5% sodium bicarbonate) and Group C: those who received acidic vaginal wash (5% acetic acid). Patients received 25 μg of Misoprostol E1 (Vagiprost® Adwia Pharmaceuticals, Egypt) every 6 h for a maximum of 24 h (total of four potential doses).
Results
The ‘acid’ group participants took a mean time of 20.46 h to reach active stage of labor, followed by the ‘normal saline’ group with 21.45 h and the ‘alkaline’ group with 22.59 h. The difference between the groups was statistically significant, with a p-value of 0.013.
Conclusions
Douching the vagina with acidic solution seems to supplement the effect of Misoprostol on inducing labor in full-term pregnancies, as evidenced by having the shortest mean time needed to reach active stage of labor.
Research funding: None declared.
Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.
Competing interests: Authors state no conflict of interest.
Informed consent: Informed consent was obtained from all individuals included in this study.
Ethical approval: The study was conducted after getting approval from an Institutional Review Board (IRB). The study conforms to the provisions of the Declaration of Helsinki.
References
1. Allen, R, O’Brien, B. Uses of misoprostol in obstetrics and gynecology. Rev Obstet Gynecol 2009;2:159–68. https://doi.org/10.3909/riog0055.Search in Google Scholar
2. Marc, B. Pharmacokinetics of prostaglandins. Stockholm: Department of Woman and Child Health, Division for Obstetrics and Gynecology, Karolinska Hospital; 2001.Search in Google Scholar
3. Moore, L, Rayburn, W. Elective induction of labor. Clin Obstet Gynecol 2006;49:698–704. https://doi.org/10.1097/00003081-200609000-00026.Search in Google Scholar PubMed
4. Karim, H, Abbas, A, Amr, N, Al-Sharaky, A, Alaa-Eddin, I. Effect of vaginal pH on the efficacy of misoprostol for induction of midtrimester abortion. J Obstet Gynaecol Res 2008;34:78–84. https://doi.org/10.1111/j.1447-0756.2007.00683.x.Search in Google Scholar PubMed
5. Tang, OS, Miao, BY, Lee, SWH, Ho, PC. Pilot study on the use of repeated doses of sublingual misoprostol in termination of pregnancy up to 12 weeks gestation. Hum Reprod 2002;17:654–8. https://doi.org/10.1093/humrep/17.3.654.Search in Google Scholar PubMed
6. Najafian, A, Rajaei, M, Beheshti, S. Efficacy of vaginal misoprostol and vaginal washing with 3% acetic acid for first trimester pregnancy termination: a randomized single blind clinical trial. Hormozgan Med J 2017;20:301–6.Search in Google Scholar
7. Behrooz, A, Shahbazian, N, Ghanavati, N. Effects of vaginal pH on the efficacy of vaginal misoprostol for induction of midtrimester abortion. Int J Pharm Res Allied Sci 2016;5:211–20.Search in Google Scholar
8. Ramsey, P, Ogburn, PJr, Harris, D, Heise, R, Ramin, K. Effect of vaginal pH on efficacy of misoprostol for cervical ripening and labor induction. Am J Obstet Gynecol 2000;182:1616–9. https://doi.org/10.1067/mob.2000.107441.Search in Google Scholar PubMed
9. Wing, DA, Lockwood, CJ, Barss, VA. Induction of labour. 2017.Search in Google Scholar
10. Josie, L Ternore. Methods of cervical ripening and induction of labor. Am Fam Physician 2003;67:2123–8.Search in Google Scholar
11. Harman, JHJr, Kim, A. Current trends in cervical ripening and induction. Am Fam Physician 1999;60:477–84.Search in Google Scholar
12. Miller, E, Beasley, D, Dunn, R, Archie, E. Lactobacilli dominance and vaginal pH: why is the human vaginal microbiome unique?. Front Microbiol 2016;7:1936. https://doi.org/10.3389/fmicb.2016.01936.Search in Google Scholar PubMed PubMed Central
13. Zanzani, M, Kohpayeh, J, Karimi, Z. The effect of vaginal pH on the efficacy of vaginal misoprostol for the induction of midtrimester pregnancy termination. Obstet Gynecol Cancer Res 2017;2:e8953. https://doi.org/10.5812/ogcr.8953.Search in Google Scholar
© 2021 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Editorial
- Global approach of the cesarean section rates
- Review
- Cesarean section one hundred years 1920–2020: the Good, the Bad and the Ugly
- Original Articles – Obstetrics
- Non-adherence to labor guidelines in cesarean sections done for failed induction and arrest of dilation
- Retrospective study of maternal and neonatal outcomes after induction compared to spontaneous start of labour in women with one previous birth in uncomplicated pregnancies ≥ 41+3
- Management of labor after external cephalic version
- Evaluation of the labour process with serial transperineal ultrasonography and prediction of the type of birth
- Comparative study regarding effect of pH on Misoprostol in induction of labor in full term primigravida pregnant women, a double blind randomized controlled trial
- Comparison of the rates of preterm birth and low birth weight of vanishing twin and primary pregnancies conceived with assisted reproductive technology
- Obstetric outcomes of pregnancy complicated by urolithiasis: a retrospective cohort study
- Serum kallistatin level is decreased in women with preeclampsia
- An observational study to assess Italian obstetrics providers’ knowledge about preventive practices and diagnosis of congenital cytomegalovirus
- Predictive values of clinical parameters and biophysical and biochemical markers in the first trimester for the detection of small-for-gestational age fetuses
- Original Articles – Newborns
- Antenatal and perinatal outcomes of refugees in high income countries
- Individualized sex-specific birth weight percentiles for gestational age based on maternal height and weight
- Inhaled nitric oxide (iNO) for preventing prematurity-related bronchopulmonary dysplasia (BPD): 7-year follow-up of the European Union Nitric Oxide (EUNO) trial
- Erratum
- Risk factors associated with adverse fetal outcomes in pregnancies affected by Coronavirus disease 2019 (COVID-19): a secondary analysis of the WAPM study on COVID-19
- Acknowledgment
- Acknowledgment
Articles in the same Issue
- Frontmatter
- Editorial
- Global approach of the cesarean section rates
- Review
- Cesarean section one hundred years 1920–2020: the Good, the Bad and the Ugly
- Original Articles – Obstetrics
- Non-adherence to labor guidelines in cesarean sections done for failed induction and arrest of dilation
- Retrospective study of maternal and neonatal outcomes after induction compared to spontaneous start of labour in women with one previous birth in uncomplicated pregnancies ≥ 41+3
- Management of labor after external cephalic version
- Evaluation of the labour process with serial transperineal ultrasonography and prediction of the type of birth
- Comparative study regarding effect of pH on Misoprostol in induction of labor in full term primigravida pregnant women, a double blind randomized controlled trial
- Comparison of the rates of preterm birth and low birth weight of vanishing twin and primary pregnancies conceived with assisted reproductive technology
- Obstetric outcomes of pregnancy complicated by urolithiasis: a retrospective cohort study
- Serum kallistatin level is decreased in women with preeclampsia
- An observational study to assess Italian obstetrics providers’ knowledge about preventive practices and diagnosis of congenital cytomegalovirus
- Predictive values of clinical parameters and biophysical and biochemical markers in the first trimester for the detection of small-for-gestational age fetuses
- Original Articles – Newborns
- Antenatal and perinatal outcomes of refugees in high income countries
- Individualized sex-specific birth weight percentiles for gestational age based on maternal height and weight
- Inhaled nitric oxide (iNO) for preventing prematurity-related bronchopulmonary dysplasia (BPD): 7-year follow-up of the European Union Nitric Oxide (EUNO) trial
- Erratum
- Risk factors associated with adverse fetal outcomes in pregnancies affected by Coronavirus disease 2019 (COVID-19): a secondary analysis of the WAPM study on COVID-19
- Acknowledgment
- Acknowledgment