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Progestogen for preventing miscarriage.

Abstract

BACKGROUND

Progesterone, a female sex hormone, is known to induce secretory changes in the lining of the uterus essential for successful implantation of a fertilized egg. It has been suggested that a causative factor in many cases of miscarriage may be inadequate secretion of progestogens. Therefore, progestational agents have been used, beginning in the first trimester of pregnancy, in an attempt to prevent spontaneous miscarriage.

OBJECTIVES

To determine the efficacy and safety of progestogens as a preventative therapy against miscarriage.

SEARCH STRATEGY

We searched the Cochrane Pregnancy and Childbirth Group trials register (April 2003), CENTRAL, MEDLINE (1966 to April 2003), EMBASE (1980 to April 2003), CINAHL (1982 to April 2003), NHMRC Clinical Trials Register (April 2003) and Meta-Register (April 2003). We searched references from relevant articles, attempting to contact authors where necessary, and contacted experts in the field for unpublished works.

SELECTION CRITERIA

Randomised or quasi-randomised controlled trials comparing progestogens with placebo or no treatment given in an effort to prevent miscarriage.

DATA COLLECTION AND ANALYSIS

Thirty trials were identified in the initial search. At least, two reviewers assessed trial quality and extracted data. Data for all outcomes were in dichotomous form and the Peto odds ratio was used in the meta-analysis for all comparisons.

MAIN RESULTS

Fourteen trials (1988 women) met the inclusion criteria. The meta-analysis of all women, regardless of gravidity and number of previous miscarriages, showed no statistically significant difference in the risk of miscarriage between progestogen and placebo or no treatment groups (odds ratio (OR) 1.05, 95% confidence interval (CI) 0.83 to 1.34) and no statistically significant difference in the incidence of adverse effect in either mother or baby. In a subgroup analysis of three trials involving women who had recurrent miscarriages (three or more consecutive miscarriages), progestogen treatment showed a statistically significant decrease in miscarriage rate compared to placebo or no treatment (OR 0.39, 95% CI 0.17 to 0.91). No statistically significant differences were found between the route of administration of progestogen (oral, intramuscular, vaginal) versus placebo or no treatment.

REVIEWER'S CONCLUSIONS

There is no evidence to support the routine use of progestogen to prevent miscarriage in early to mid pregnancy. However, further trials in women with a history of recurrent miscarriage may be warranted, given the trend for improved live birth rates in these women and the finding of no statistically significant difference between treatment and control groups in rates of adverse effects suffered by either mother or baby in the available evidence.

Authors+Show Affiliations

Research Division, Royal College of Paediatrics, 50 Hallam Street, London, UK, W1W 6DE.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Meta-Analysis
Review
Systematic Review

Language

eng

PubMed ID

14583982

Citation

Oates-Whitehead, R M., et al. "Progestogen for Preventing Miscarriage." The Cochrane Database of Systematic Reviews, 2003, p. CD003511.
Oates-Whitehead RM, Haas DM, Carrier JA. Progestogen for preventing miscarriage. Cochrane Database Syst Rev. 2003.
Oates-Whitehead, R. M., Haas, D. M., & Carrier, J. A. (2003). Progestogen for preventing miscarriage. The Cochrane Database of Systematic Reviews, (4), CD003511.
Oates-Whitehead RM, Haas DM, Carrier JA. Progestogen for Preventing Miscarriage. Cochrane Database Syst Rev. 2003;(4)CD003511. PubMed PMID: 14583982.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Progestogen for preventing miscarriage. AU - Oates-Whitehead,R M, AU - Haas,D M, AU - Carrier,J A K, PY - 2003/10/30/pubmed PY - 2004/5/5/medline PY - 2003/10/30/entrez SP - CD003511 EP - CD003511 JF - The Cochrane database of systematic reviews JO - Cochrane Database Syst Rev IS - 4 N2 - BACKGROUND: Progesterone, a female sex hormone, is known to induce secretory changes in the lining of the uterus essential for successful implantation of a fertilized egg. It has been suggested that a causative factor in many cases of miscarriage may be inadequate secretion of progestogens. Therefore, progestational agents have been used, beginning in the first trimester of pregnancy, in an attempt to prevent spontaneous miscarriage. OBJECTIVES: To determine the efficacy and safety of progestogens as a preventative therapy against miscarriage. SEARCH STRATEGY: We searched the Cochrane Pregnancy and Childbirth Group trials register (April 2003), CENTRAL, MEDLINE (1966 to April 2003), EMBASE (1980 to April 2003), CINAHL (1982 to April 2003), NHMRC Clinical Trials Register (April 2003) and Meta-Register (April 2003). We searched references from relevant articles, attempting to contact authors where necessary, and contacted experts in the field for unpublished works. SELECTION CRITERIA: Randomised or quasi-randomised controlled trials comparing progestogens with placebo or no treatment given in an effort to prevent miscarriage. DATA COLLECTION AND ANALYSIS: Thirty trials were identified in the initial search. At least, two reviewers assessed trial quality and extracted data. Data for all outcomes were in dichotomous form and the Peto odds ratio was used in the meta-analysis for all comparisons. MAIN RESULTS: Fourteen trials (1988 women) met the inclusion criteria. The meta-analysis of all women, regardless of gravidity and number of previous miscarriages, showed no statistically significant difference in the risk of miscarriage between progestogen and placebo or no treatment groups (odds ratio (OR) 1.05, 95% confidence interval (CI) 0.83 to 1.34) and no statistically significant difference in the incidence of adverse effect in either mother or baby. In a subgroup analysis of three trials involving women who had recurrent miscarriages (three or more consecutive miscarriages), progestogen treatment showed a statistically significant decrease in miscarriage rate compared to placebo or no treatment (OR 0.39, 95% CI 0.17 to 0.91). No statistically significant differences were found between the route of administration of progestogen (oral, intramuscular, vaginal) versus placebo or no treatment. REVIEWER'S CONCLUSIONS: There is no evidence to support the routine use of progestogen to prevent miscarriage in early to mid pregnancy. However, further trials in women with a history of recurrent miscarriage may be warranted, given the trend for improved live birth rates in these women and the finding of no statistically significant difference between treatment and control groups in rates of adverse effects suffered by either mother or baby in the available evidence. SN - 1469-493X UR - https://www.unboundmedicine.com/medline/citation/14583982/Progestogen_for_preventing_miscarriage_ L2 - https://doi.org/10.1002/14651858.CD003511 DB - PRIME DP - Unbound Medicine ER -