Vaginosis, BacterialNCT01322971
Efficacy Study of Preconception Treatment of an Asymptomatic Bacterial Infection in an Infertility Population
A study testing Metronidazole in people with Vaginosis, Bacterial and Infertility, run by Stanford University at 1 site in United States.
Trial summary
Bacterial vaginosis (BV) is a common vaginal infection characterized by a pathologic shift in the normal vaginal flora. BV has been associated with a number of poor reproductive outcomes, including infertility, preterm labor and premature rupture of membranes. Read more about this study
- Who is it for?
- Ages 18 years and older, women onlyHealthy volunteers can take part
- Conditions the study is for
- Vaginosis, Bacterial, Infertility, Miscarriage
- What is being tested?
- Metronidazole
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 2 participants
- Where
- 1 siteUnited States
- Study dates
- Feb 2011to Jun 2012
- Phase
- Interventional
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- Women only
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Women who are actively trying to conceive via intrauterine insemination or in vitro fertilization
Who cannot join
- Current use of an oral or vaginal antibiotic.
- History of allergy or adverse reaction to metronidazole.
- Prior enrollment in study (patients returning for repeat cycle may not be re-enrolled).
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Pregnancy Outcomes Following Preconception Treatment of Asymptomatic Bacterial Vaginosis in an Infertility Population: A Prospective, Randomized, Double-Blind, Placebo-Controlled Trial.
Bacterial vaginosis (BV) is a common vaginal infection characterized by a pathologic shift in the normal vaginal flora. BV has been associated with a number of poor reproductive outcomes, including infertility, preterm labor and premature rupture of membranes. If BV does disrupt normal embryologic development, then the treatment of BV prior to conception may improve implantation rates and other pregnancy outcomes in the infertile population.
This is a prospective, randomized, double-blind, placebo-controlled trial in which infertile women undergoing intrauterine insemination or embryo transfer are screened for BV prior to treatment. Those patients who screen positive for BV will then be randomized into the treatment arm(metronidazole 500mg by mouth twice daily for 7 days) or the control arm (placebo by mouth twice daily for 7 days). The primary outcome, positive pregnancy test rate (i.e. biochemical pregnancy rate), will then be assessed. Secondary outcomes, such as clinical pregnancy rate, miscarriage rate, and live birth rate will also be examined.
Read the detailed description
The purpose of this study is to determine if preconception treatment of asymptomatic bacterial vaginosis improves pregnancy outcomes (i.e. biochemical pregnancy rate). Study protocol as follows:
- Patients will be notified of study via face-to-face contact at the initial clinic visit (baseline ultrasound visit, menstrual cycle day 2-5), by physician referral or the Stanford website. Patients expressing interest will be screened in person to confirm that they meet all enrollment criteria. The participant will be asked to sign informed consent documents and a brief intake questionnaire with then be administered.
- Enrolled patients will then be screened for bacterial vaginosis at their next visit (typically on menstrual cycle day 12), prior to transvaginal ultrasound. The screening will require that a speculum be inserted into the vagina and a vaginal smear be collected with a swab from the posterior fornix. A microscopic slide will be prepared by rolling the swab on the surface of a glass slide. The diagnosis of bacterial vaginosis will be established clinically using the Amsel criteria to confirm 3 of the following 4 signs: clue cells; vaginal pH ≥4.5; fishy odor before or after the addition of 10% potassium hydroxide solution to a wet-mount side; and a homogeneous, off-white, discharge. For validation of clinical diagnosis, 100% of screen positive slides, and 10% of screen negative slides, will be sent for to the Department of Pathology for Gram staining.
- The patients with a positive screen for bacterial vaginosis will then be randomized to receive metronidazole 500mg orally twice daily for seven days (treatment arm) or placebo orally twice daily for seven days(control arm). Randomization will be performed using a computer-generated code. Those patients whose screen is negative will also be followed for outcomes, but no randomization will be performed.
- All randomized patients will continue with routine monitoring and insemination as planned by their treating physician.
- If pregnancy is confirmed at least 12 weeks after intrauterine insemination by ultrasound evidence of a fetus with heartbeat, information will then be collected regarding the pregnancy and its outcome.
- Primary and secondary outcomes will be followed for 2 years after date of enrollment for all patients.
- Conditions
- Vaginosis, Bacterial, Infertility, Miscarriage
- Being tested
- Metronidazole, Placebo
- Keywords
- Bacterial Vaginosis, Infertility, Miscarriage, Metronidazole
- Medical subject headings
- Vaginosis, Bacterial, Infertility, Abortion, Spontaneous
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
MetronidazoleDrug
Metronidazole 500mg orally twice daily for seven days
PlaceboDrug
Placebo will be administered orally twice daily for seven days
| Study group | Role | What they receive |
|---|---|---|
| Metronidazole | Active comparator | Patients randomized to the metronidazole arm will receive metronidazole 500mg orally twice daily for seven days. Receives: Drug: Metronidazole |
| Placebo | Placebo comparator | Patients randomized to the placebo arm will receive placebo orally twice daily for seven days(control arm Receives: Drug: Placebo |
What is being measured
The primary outcome is the main question the study is designed to answer.
Biochemical Pregnancy Rate (Positive Pregnancy Test)
Biochemical pregnancy rate was defined as number of participants who had a positive pregnancy test
Measured: up to 2 years
Secondary outcomes (3)
Pregnancy Rate (Pregnancy Visible on Ultrasound)
Measured: up to 2 years
Miscarriage Rate (Loss of a Clinically Recognized Pregnancy)
Measured: up to 2 years
Infectious Morbidity (i.e. Chorioamnionitis, Neonatal Sepsis)
Measured: up to 2 years
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted25 Mar 2011 (estimated)
- Study startFeb 2011
- Primary completionJun 2012
- Study completionJun 2012
Why it stopped: Disease prevalence lower than expected in population.
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (13)Papers the sponsor has linked to this study.
- Other trials for Vaginosis, BacterialStudies of the same condition, open and under way.
- More trials run by Stanford UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 2 participants (actual)
Sponsor and investigators
- Lead sponsor
- Stanford University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Ruth Bunker Lathi, Stanford University
- Investigators
- Ruth Bunker Lathi, Principal investigator, Stanford University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01322971
- Sponsor's protocol ID
- SU-03212011-7604
- Other IDs
- IRB Protocol Number 20103
- Status last verified
- Dec 2021
- First submitted
- 23 Mar 2011
- Last updated
- 20 Dec 2021
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
Publications
American College of Obstetricians and Gynecologists. ACOG Practice Bulletin. Assessment of risk factors for preterm birth. Clinical management guidelines for obstetrician-gynecologists. Number 31, October 2001. (Replaces Technical Bulletin number 206, June 1995; Committee Opinion number 172, May 1996; Committee Opinion number 187, September 1997; Committee Opinion number 198, February 1998; and Committee Opinion number 251, January 2001). Obstet Gynecol. 2001 Oct;98(4):709-16.
PubMed 11592272Carey JC, Klebanoff MA, Hauth JC, Hillier SL, Thom EA, Ernest JM, Heine RP, Nugent RP, Fischer ML, Leveno KJ, Wapner R, Varner M. Metronidazole to prevent preterm delivery in pregnant women with asymptomatic bacterial vaginosis. National Institute of Child Health and Human Development Network of Maternal-Fetal Medicine Units. N Engl J Med. 2000 Feb 24;342(8):534-40. doi: 10.1056/NEJM200002243420802.
PubMed 10684911Donders GG, Van Bulck B, Caudron J, Londers L, Vereecken A, Spitz B. Relationship of bacterial vaginosis and mycoplasmas to the risk of spontaneous abortion. Am J Obstet Gynecol. 2000 Aug;183(2):431-7. doi: 10.1067/mob.2000.105738.
PubMed 10942482Hay PE, Lamont RF, Taylor-Robinson D, Morgan DJ, Ison C, Pearson J. Abnormal bacterial colonisation of the genital tract and subsequent preterm delivery and late miscarriage. BMJ. 1994 Jan 29;308(6924):295-8. doi: 10.1136/bmj.308.6924.295.
PubMed 8124116Hay PE. Bacterial vaginosis and miscarriage. Curr Opin Infect Dis. 2004 Feb;17(1):41-4. doi: 10.1097/00001432-200402000-00008.
PubMed 15090889Hillier SL, Nugent RP, Eschenbach DA, Krohn MA, Gibbs RS, Martin DH, Cotch MF, Edelman R, Pastorek JG 2nd, Rao AV, et al. Association between bacterial vaginosis and preterm delivery of a low-birth-weight infant. The Vaginal Infections and Prematurity Study Group. N Engl J Med. 1995 Dec 28;333(26):1737-42. doi: 10.1056/NEJM199512283332604.
PubMed 7491137Korn AP, Bolan G, Padian N, Ohm-Smith M, Schachter J, Landers DV. Plasma cell endometritis in women with symptomatic bacterial vaginosis. Obstet Gynecol. 1995 Mar;85(3):387-90. doi: 10.1016/0029-7844(94)00400-8.
PubMed 7862377Liversedge NH, Turner A, Horner PJ, Keay SD, Jenkins JM, Hull MG. The influence of bacterial vaginosis on in-vitro fertilization and embryo implantation during assisted reproduction treatment. Hum Reprod. 1999 Sep;14(9):2411-5. doi: 10.1093/humrep/14.9.2411.
PubMed 10469722McDonald HM, Brocklehurst P, Gordon A. Antibiotics for treating bacterial vaginosis in pregnancy. Cochrane Database Syst Rev. 2007 Jan 24;(1):CD000262. doi: 10.1002/14651858.CD000262.pub3.
PubMed 17253447Nelson DB, Bellamy S, Nachamkin I, Ness RB, Macones GA, Allen-Taylor L. First trimester bacterial vaginosis, individual microorganism levels, and risk of second trimester pregnancy loss among urban women. Fertil Steril. 2007 Nov;88(5):1396-403. doi: 10.1016/j.fertnstert.2007.01.035. Epub 2007 Apr 16.
PubMed 17434499Platz-Christensen JJ, Brandberg A, Wiqvist N. Increased prostaglandin concentrations in the cervical mucus of pregnant women with bacterial vaginosis. Prostaglandins. 1992 Feb;43(2):133-4. doi: 10.1016/0090-6980(92)90082-5.
PubMed 1542740Platz-Christensen JJ, Mattsby-Baltzer I, Thomsen P, Wiqvist N. Endotoxin and interleukin-1 alpha in the cervical mucus and vaginal fluid of pregnant women with bacterial vaginosis. Am J Obstet Gynecol. 1993 Nov;169(5):1161-6. doi: 10.1016/0002-9378(93)90274-m.
PubMed 8238178Wilson JD, Ralph SG, Rutherford AJ. Rates of bacterial vaginosis in women undergoing in vitro fertilisation for different types of infertility. BJOG. 2002 Jun;109(6):714-7. doi: 10.1111/j.1471-0528.2002.01297.x.
PubMed 12118653
Study at a glance
From the registry record, last updated by the sponsor on 20 Dec 2021. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Pregnancy Outcomes Following Preconception Treatment of Asymptomatic Bacterial Vaginosis in an Infertility Population: A Prospective, Randomized, Double-Blind, Placebo-Controlled Trial.
- ClinicalTrials.gov ID
- NCT01322971
- Acronym / sponsor ID
- SU-03212011-7604
- Conditions
- Vaginosis, Bacterial, Infertility, Miscarriage
- Keywords
- Bacterial Vaginosis, Infertility, Miscarriage, Metronidazole
- Study type
- Interventional
- Recruitment status
- TerminatedReason stopped: Disease prevalence lower than expected in population.
- Enrolment
- 2 participants (actual)
- Lead sponsor
- Stanford UniversityUniversity, hospital or other
- Study start
- Feb 2011
- Primary completion
- Jun 2012 (actual)
- Study completion
- Jun 2012 (actual)
- First posted
- 25 Mar 2011 (estimated)
- Results
- Posted 20 Jan 2017
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Bacterial vaginosis (BV) is a common vaginal infection characterized by a pathologic shift in the normal vaginal flora. BV has been associated with a number of poor reproductive outcomes, including infertility, preterm labor and premature rupture of membranes. If BV does disrupt normal embryologic development, then the treatment of BV prior to conception may improve implantation rates and other pregnancy outcomes in the infertile population.
This is a prospective, randomized, double-blind, placebo-controlled trial in which infertile women undergoing intrauterine insemination or embryo transfer are screened for BV prior to treatment. Those patients who screen positive for BV will then be randomized into the treatment arm(metronidazole 500mg by mouth twice daily for 7 days) or the control arm (placebo by mouth twice daily for 7 days). The primary outcome, positive pregnancy test rate (i.e. biochemical pregnancy rate), will then be assessed. Secondary outcomes, such as clinical pregnancy rate, miscarriage rate, and live birth rate will also be examined.
Detailed description
The purpose of this study is to determine if preconception treatment of asymptomatic bacterial vaginosis improves pregnancy outcomes (i.e. biochemical pregnancy rate). Study protocol as follows:
- Patients will be notified of study via face-to-face contact at the initial clinic visit (baseline ultrasound visit, menstrual cycle day 2-5), by physician referral or the Stanford website. Patients expressing interest will be screened in person to confirm that they meet all enrollment criteria. The participant will be asked to sign informed consent documents and a brief intake questionnaire with then be administered.
- Enrolled patients will then be screened for bacterial vaginosis at their next visit (typically on menstrual cycle day 12), prior to transvaginal ultrasound. The screening will require that a speculum be inserted into the vagina and a vaginal smear be collected with a swab from the posterior fornix. A microscopic slide will be prepared by rolling the swab on the surface of a glass slide. The diagnosis of bacterial vaginosis will be established clinically using the Amsel criteria to confirm 3 of the following 4 signs: clue cells; vaginal pH ≥4.5; fishy odor before or after the addition of 10% potassium hydroxide solution to a wet-mount side; and a homogeneous, off-white, discharge. For validation of clinical diagnosis, 100% of screen positive slides, and 10% of screen negative slides, will be sent for to the Department of Pathology for Gram staining.
- The patients with a positive screen for bacterial vaginosis will then be randomized to receive metronidazole 500mg orally twice daily for seven days (treatment arm) or placebo orally twice daily for seven days(control arm). Randomization will be performed using a computer-generated code. Those patients whose screen is negative will also be followed for outcomes, but no randomization will be performed.
- All randomized patients will continue with routine monitoring and insemination as planned by their treating physician.
- If pregnancy is confirmed at least 12 weeks after intrauterine insemination by ultrasound evidence of a fetus with heartbeat, information will then be collected regarding the pregnancy and its outcome.
- Primary and secondary outcomes will be followed for 2 years after date of enrollment for all patients.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Metronidazole | Active comparator | Drug: MetronidazolePatients randomized to the metronidazole arm will receive metronidazole 500mg orally twice daily for seven days. |
| Placebo | Placebo comparator | Drug: PlaceboPatients randomized to the placebo arm will receive placebo orally twice daily for seven days(control arm |
Who may qualify
- Ages
- 18 years and older
- Sex
- Female only
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- Women who are actively trying to conceive via intrauterine insemination or in vitro fertilization
Key exclusion criteria (3 listed)
- Current use of an oral or vaginal antibiotic.
- History of allergy or adverse reaction to metronidazole.
- Prior enrollment in study (patients returning for repeat cycle may not be re-enrolled).
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| MetronidazoleMetronidazole 500mg orally twice daily for seven days | Drug | Metronidazole |
| PlaceboPlacebo will be administered orally twice daily for seven days | Drug | Placebo |
Primary outcome
Biochemical Pregnancy Rate (Positive Pregnancy Test)
Time frame: up to 2 years
Biochemical pregnancy rate was defined as number of participants who had a positive pregnancy test
3 secondary outcomes
Pregnancy Rate (Pregnancy Visible on Ultrasound)
Time frame: up to 2 years
Miscarriage Rate (Loss of a Clinically Recognized Pregnancy)
Time frame: up to 2 years
Infectious Morbidity (i.e. Chorioamnionitis, Neonatal Sepsis)
Time frame: up to 2 years
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 20 Dec 2021.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Background: PubMed 11592272American College of Obstetricians and Gynecologists. ACOG Practice Bulletin. Assessment of risk factors for preterm birth. Clinical management guidelines for obstetrician-gynecologists. Number 31, October 2001. (Replaces Technical Bulletin number 206, June 1995; Committee Opinion number 172, May 1996; Committee Opinion number 187, September 1997; Committee Opinion number 198, February 1998; and Committee Opinion number 251, January 2001). Obstet Gynecol. 2001 Oct;98(4):709-16.
- Background: PubMed 10684911Carey JC, Klebanoff MA, Hauth JC, Hillier SL, Thom EA, Ernest JM, Heine RP, Nugent RP, Fischer ML, Leveno KJ, Wapner R, Varner M. Metronidazole to prevent preterm delivery in pregnant women with asymptomatic bacterial vaginosis. National Institute of Child Health and Human Development Network of Maternal-Fetal Medicine Units. N Engl J Med. 2000 Feb 24;342(8):534-40. doi: 10.1056/NEJM200002243420802.
- Background: PubMed 10942482Donders GG, Van Bulck B, Caudron J, Londers L, Vereecken A, Spitz B. Relationship of bacterial vaginosis and mycoplasmas to the risk of spontaneous abortion. Am J Obstet Gynecol. 2000 Aug;183(2):431-7. doi: 10.1067/mob.2000.105738.
- Background: PubMed 8124116Hay PE, Lamont RF, Taylor-Robinson D, Morgan DJ, Ison C, Pearson J. Abnormal bacterial colonisation of the genital tract and subsequent preterm delivery and late miscarriage. BMJ. 1994 Jan 29;308(6924):295-8. doi: 10.1136/bmj.308.6924.295.
- Background: PubMed 15090889Hay PE. Bacterial vaginosis and miscarriage. Curr Opin Infect Dis. 2004 Feb;17(1):41-4. doi: 10.1097/00001432-200402000-00008.
- Background: PubMed 7491137Hillier SL, Nugent RP, Eschenbach DA, Krohn MA, Gibbs RS, Martin DH, Cotch MF, Edelman R, Pastorek JG 2nd, Rao AV, et al. Association between bacterial vaginosis and preterm delivery of a low-birth-weight infant. The Vaginal Infections and Prematurity Study Group. N Engl J Med. 1995 Dec 28;333(26):1737-42. doi: 10.1056/NEJM199512283332604.
- Background: PubMed 7862377Korn AP, Bolan G, Padian N, Ohm-Smith M, Schachter J, Landers DV. Plasma cell endometritis in women with symptomatic bacterial vaginosis. Obstet Gynecol. 1995 Mar;85(3):387-90. doi: 10.1016/0029-7844(94)00400-8.
- Background: PubMed 10469722Liversedge NH, Turner A, Horner PJ, Keay SD, Jenkins JM, Hull MG. The influence of bacterial vaginosis on in-vitro fertilization and embryo implantation during assisted reproduction treatment. Hum Reprod. 1999 Sep;14(9):2411-5. doi: 10.1093/humrep/14.9.2411.
- Background: PubMed 17253447McDonald HM, Brocklehurst P, Gordon A. Antibiotics for treating bacterial vaginosis in pregnancy. Cochrane Database Syst Rev. 2007 Jan 24;(1):CD000262. doi: 10.1002/14651858.CD000262.pub3.
- Background: PubMed 17434499Nelson DB, Bellamy S, Nachamkin I, Ness RB, Macones GA, Allen-Taylor L. First trimester bacterial vaginosis, individual microorganism levels, and risk of second trimester pregnancy loss among urban women. Fertil Steril. 2007 Nov;88(5):1396-403. doi: 10.1016/j.fertnstert.2007.01.035. Epub 2007 Apr 16.
- Background: PubMed 1542740Platz-Christensen JJ, Brandberg A, Wiqvist N. Increased prostaglandin concentrations in the cervical mucus of pregnant women with bacterial vaginosis. Prostaglandins. 1992 Feb;43(2):133-4. doi: 10.1016/0090-6980(92)90082-5.
- Background: PubMed 8238178Platz-Christensen JJ, Mattsby-Baltzer I, Thomsen P, Wiqvist N. Endotoxin and interleukin-1 alpha in the cervical mucus and vaginal fluid of pregnant women with bacterial vaginosis. Am J Obstet Gynecol. 1993 Nov;169(5):1161-6. doi: 10.1016/0002-9378(93)90274-m.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Ruth Bunker Lathi principal investigator
Stanford University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Metronidazole in people with Vaginosis, Bacterial and Infertility, run by Stanford University at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: stopped early, as of the sponsor's last update on 20 Dec 2021. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
Yes. Results are posted in the registry (first posted 20 Jan 2017). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Biochemical Pregnancy Rate (Positive Pregnancy Test) (time frame: up to 2 years). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT01322971, which also lists 13 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Dec 2021.