Ying Cheong

Asherman syndrome—one century later

OBJECTIVE To provide an update on the current knowledge of Asherman syndrome. DESIGN Literature review. SETTING The worldwide reports of this disease. PATIENT(S) Patients with Asherman syndrome who presented with amenorrhea or hypomenorrhea, infertility, or recurrent pregnancy loss. INTERVENTION(S) Hysteroscopy and hysteroscopic surgery have been the gold standard of diagnosis and treatment respectively for this condition. MAIN OUTCOME MEASURE(S) The etiology, pathology, symptomatology, diagnosis, treatment, and reproductive outcomes were analyzed. RESULT(S) This syndrome occurs mainly as a result of trauma to the gravid uterine cavity, which leads to the formation of intrauterine and/or intracervical adhesions. Despite the advances in hysteroscopic surgery, the treatment of moderate to severe Asherman syndrome still presents a challenge. Furthermore, pregnancy after treatment remains high risk with complications including spontaneous abortion, preterm delivery, intrauterine growth restriction, placenta accrete or praevia, or even uterine rupture. CONCLUSION(S) The management of moderate to severe disease still poses a challenge, and the prognosis of severe disease remains poor. Close antenatal surveillance and monitoring are necessary for women who conceive after treatment.

A Randomized Trial of Progesterone in Women with Recurrent Miscarriages

BACKGROUND Progesterone is essential for the maintenance of pregnancy. However, whether progesterone supplementation in the first trimester of pregnancy would increase the rate of live births among women with a history of unexplained recurrent miscarriages is uncertain. METHODS We conducted a multicenter, double-blind, placebo-controlled, randomized trial to investigate whether treatment with progesterone would increase the rates of live births and newborn survival among women with unexplained recurrent miscarriage. We randomly assigned women with recurrent miscarriages to receive twice-daily vaginal suppositories containing either 400 mg of micronized progesterone or matched placebo from a time soon after a positive urinary pregnancy test (and no later than 6 weeks of gestation) through 12 weeks of gestation. The primary outcome was live birth after 24 weeks of gestation. RESULTS A total of 1568 women were assessed for eligibility, and 836 of these women who conceived naturally within 1 year and remained willing to participate in the trial were randomly assigned to receive either progesterone (404 women) or placebo (432 women). The follow-up rate for the primary outcome was 98.8% (826 of 836 women). In an intention-to-treat analysis, the rate of live births was 65.8% (262 of 398 women) in the progesterone group and 63.3% (271 of 428 women) in the placebo group (relative rate, 1.04; 95% confidence interval [CI], 0.94 to 1.15; rate difference, 2.5 percentage points; 95% CI, -4.0 to 9.0). There were no significant between-group differences in the rate of adverse events. CONCLUSIONS Progesterone therapy in the first trimester of pregnancy did not result in a significantly higher rate of live births among women with a history of unexplained recurrent miscarriages. (Funded by the United Kingdom National Institute of Health Research; PROMISE Current Controlled Trials number, ISRCTN92644181.).

Laparoscopic surgery for endometriosis : How often do we need to re-operate?

Summary This study aimed to examine the rate of re-operation in women with endometriosis over a 10-year period. This was a retrospective study set in a university hospital in the UK. Notes of all women diagnosed with endometriosis were reviewed and data entered on a standard proforma. A total of 486 out of 988 procedures were for treatment of endometriosis. Some 240 (49%) had pelvic pain and 246 (51%) had subfertility. The mean age of those women who had a re-operation was lower than those who did not have any further operations. Using logistic regression, three factors were found to be the most important factors influencing the likelihood of women having re-operation – in decreasing order of importance, these factors were: (1) age, (2) pregnancy achievement and (3) improvement of symptoms. Re-operation occurred in 51% of our study population, the information may be useful for guidance of our patients.

The impact of endometrioma on IVF/ICSI outcomes: a systematic review and meta-analysis

BACKGROUND Endometriosis is a disease known to be detrimental to fertility. Women with endometriosis, and the presence of endometrioma, may require artificial reproductive techniques (ART) to achieve a pregnancy. The specific impact of endometrioma alone and the impact of surgical intervention for endometrioma on the reproductive outcome of women undergoing IVF/ICSI are areas that require further clarification. The objectives of this review were as follows: (i) to determine the impact of endometrioma on IVF/ICSI outcomes, (ii) to determine the impact of surgery for endometrioma on IVF/ICSI outcome and (iii) to determine the effect of different surgical techniques on IVF/ICSI outcomes. METHODS We performed a systematic review and meta-analysis examining subfertile women who have endometrioma and are undergoing IVF/ICSI, and who have or have not had any surgical management for endometrioma before IVF/ICSI. The primary outcome was live birth rate (LBR). Our secondary outcomes were clinical pregnancy rate (CPR), mean number of oocyte retrieved (MNOR), miscarriage rate (MR), fertilization rate, implantation rate, antral follicle count (AFC), total stimulating hormone dose, and any rates of adverse effects such as cancellation and associated complications during the IVF/ICSI treatment. RESULTS We included 33 studies for the meta-analysis. The majority of the studies were retrospective (30/33), and three were RCTs. Compared with women with no endometrioma undergoing IVF/ICSI, women with endometrioma had a similar LBR (odds ratio [OR] 0.98; 95% CI [0.71, 1.36], 5 studies, 928 women, I(2) = 0%) and a similar CPR (OR 1.17; 95% CI [0.87, 1.58], 5 studies, 928 women, I(2) = 0%), a lower mean number of oocytes retrieved (SMD -0.23; 95% CI [-0.37, -0.10], 5 studies, 941 cycles, I(2) = 37%) and a higher cycle cancellation rate compared with those without the disease (OR 2.83; 95% CI [1.32, 6.06], 3 studies, 491 women, I(2) = 0%). Compared with women with no surgical treatment, women who had their endometrioma surgically treated before IVF/ICSI had a similar LBR (OR 0.90; 95% CI [0.63, 1.28], 5 studies, 655 women, I(2) = 32%), a similar CPR (OR 0.97; 95% CI [0.78, 1.20], 11 studies, 1512 women, I(2) = 0%) and a similar mean number of oocytes retrieved (SMD -0.17; 95% CI [-0.38, 0.05], 9 studies, 810 cycles, I(2) = 63%). CONCLUSIONS Women with endometrioma undergoing IVF/ICSI had similar reproductive outcomes compared with those without the disease, although their cycle cancellation rate was significantly higher. Surgical treatment of endometrioma did not alter the outcome of IVF/ICSI treatment compared with those who did not receive surgical intervention. Considering that the reduced ovarian reserve may be attributed to the presence of endometrioma per se, and the potential detrimental impact from surgical intervention, individualization of care for women with endometrioma prior to IVF/ICSI may help optimize their IVF/ICSI results.

Influence of endometriosis on assisted reproductive technology outcomes: a systematic review and meta-analysis.

OBJECTIVE: To investigate the association of endometriosis on assisted reproductive technology (ART) outcomes and to review if surgical treatment of endometriosis before ART affects the outcomes. DATA SOURCES: We searched studies published between 1980 and 2014 on endometriosis and ART outcome. We searched MEDLINE, PubMed, ClinicalTrials.gov, and Cochrane databases and performed a manual search. METHODS OF STUDY SELECTION: A total of 1,346 articles were identified, and 36 studies were eligible to be included for data synthesis. We included published cohort studies and randomized controlled trials. TABULATION, INTEGRATION, AND RESULTS: Compared with women without endometriosis, women with endometriosis undertaking in vitro fertilization and intracytoplasmic sperm injection have a similar live birth rate per woman (odds ratio [OR] 0.94, 95% confidence interval [CI] 0.84–1.06, 13 studies, 12,682 patients, I2=35%), a lower clinical pregnancy rate per woman (OR 0.78, 95% CI 0.65–0.94), 24 studies, 20,757 patients, I2=66%), a lower mean number of oocyte retrieved per cycle (mean difference −1.98, 95% CI −2.87 to −1.09, 17 studies, 17,593 cycles, I2=97%), and a similar miscarriage rate per woman (OR 1.26, 95% CI (0.92–1.70, nine studies, 1,259 patients, I2=0%). Women with more severe disease (American Society for Reproductive Medicine III–IV) have a lower live birth rate, clinical pregnancy rate, and mean number of oocytes retrieved when compared with women with no endometriosis. CONCLUSION: Women with and without endometriosis have comparable ART outcomes in terms of live births, whereas those with severe endometriosis have inferior outcomes. There is insufficient evidence to recommend surgery routinely before undergoing ART.

To close or not to close? A systematic review and a meta-analysis of peritoneal non-closure and adhesion formation after caesarean section

Many gynaecologists do not currently close the peritoneum after caesarean section (CS). Recently, several studies examining adhesion formation after repeat CS appear to favour closure of the peritoneum after caesarean section. We performed a systematic review of the current available evidence with regard to the long-term outcome, mainly in terms of adhesion formation after closure versus non-closure of peritoneum during CS. We undertook a literature search between January 1995 and February 2008 using MEDLINE, Pubmed, EMBASE, Cochrane central controlled trials register and Cochrane pregnancy and childbirth group trials register. We also had searched all the references cited in the relevant studies. Both English and non-English language papers were included. Prospective studies which compared peritoneal closure versus non-closure during CS in terms of adhesion formation were included. Studies were included if they had a primary objective to examine adhesion formation in a repeat caesarean section, had a clear study design, had an adhesion scoring system, excluded patients who had adhesions in the primary caesarean section or interim surgeries after the primary caesarean section, and had no usage of anti-adhesion agents in the primary caesarean section. Retrospective studies which were performed by case-notes review alone, were excluded. Eleven studies were identified via our search strategy. Five were retrospective and six were prospective. Out of the eleven studies, three satisfied the inclusion criteria and were included (n=249); two studies were follow-ups of RCTs and one was not randomised. Out of 249 women included in the analysis, 110 had peritoneal closure during CS whereas the other 139 did not have peritoneal closure. Meta-analysis was performed using the two randomised studies plus (i) the unadjusted estimate from the non-randomised study and (ii) the reported adjusted estimate, adjusted for baseline differences in the groups. Non-closure of the peritoneum during CS resulted in a significantly increased likelihood of adhesion formation in both meta-analyses--OR (95% CI): (i) 2.60 (1.48-4.56) and (ii) 4.23 (2.06-8.69). This systematic review has demonstrated that according to current data in the literature, there is some evidence to suggest that non-closure of the peritoneum after caesarean section is associated with more adhesion formation compared to closure.

Influence of shift work on early reproductive outcomes: a systematic review and meta-analysis.

OBJECTIVE: To determine whether an association exists between shift work and early reproductive outcomes. DATA SOURCES: MEDLINE, Embase, and Web of Science were searched. Additional sources included Google Scholar, the Cochrane Library, online publications of national colleges, the ClinicalTrials.gov, and references of retrieved papers. METHODS OF STUDY SELECTION: Included studies compared female shift workers (work outside 8:00 AM to 6:00 PM) with nonshift workers with menstrual disruption (cycles less than 25 days or greater than 31 days), infertility (time-to-pregnancy exceeding 12 months), or early spontaneous pregnancy loss (less than 25 weeks). TABULATION, INTEGRATION, AND RESULTS: Two reviewers extracted adjusted and raw data. Random effect models were used to pool data weighting for the inverse of variance. Assessments of heterogeneity, bias, and subgroup analyses were performed. Sixteen independent cohorts from 15 studies (123,403 women) were subject to analysis. Shift workers had increased rates of menstrual disruption (16.05% [2,207/13,749] compared with 13.05% [7,561/57,932] [n=71.681, odds ratio {OR} 1.22, 95% confidence interval {CI} 1.15–1.29, I2 0%]) and infertility (11.3% [529/4,668] compared with 9.9% [2,354/23,811] [OR 1.80, 95% CI 1.01–3.20, I2 94%]) but not early spontaneous pregnancy loss (11.84% [939/7,931] compared with 12.11% [1,898/15,673] [n=23,604, OR 0.96, 95% CI 0.88–1.05, I2 0%]). Night shifts were associated with increased early spontaneous pregnancy loss (n=13,018, OR 1.29, 95% CI 1.11–1.50, I2 0%). Confounder adjustment led to persistent relationships between shift work and menstrual disruption (adjusted OR 1.15, 95% CI 1.01–1.31, I2 70%) but not infertility (adjusted OR 1.11 95% CI 0.86–1.44, I2 61%). The association between night shifts and early spontaneous pregnancy loss remained (adjusted OR 1.41 95% CI 1.22–1.63, I2 0%). CONCLUSION: This review provides evidence for an association between performing shift work and early reproductive outcomes, consistent with later pregnancy findings. However, there is currently insufficient evidence for clinicians to advise restricting shift work in women of reproductive age.

Can formal education and training improve the outcome of instrumental delivery

OBJECTIVE(S) The primary objective was to examine the effect of formal education and training on instrumental delivery with respect to its success rate and associated neonatal and maternal morbidity. The secondary objective was to determine factors that could influence the success rate of instrumental delivery. STUDY DESIGN Prospective case-control study with historical controls set in a teaching hospital in Sheffield. The prospective group included all women who had instrumental deliveries between 1 November 1999 and 29 February 2000. The control group included all women who delivered between 1 February 1997 and 1 February 1998. An educational package involving formal postgraduate training and self-directed learning were introduced in the time period between the prospective and the control groups. Medical notes were reviewed in the historical controls. For both the control and prospective groups, the following patient characteristics were recorded: maternal age, parity, whether or not onset of labour was induced, use of oxytocin in the second stage of labour, delay in the second stage, operator grade, vaginal findings at delivery and the use of epidural analgesia. RESULTS The overall failure rate was not different in the prospective group (16%) compared with the control group (18.5%). However, the introduction of an educational package was associated with significant decrease in maternal morbidity associated with cervical, severe labial and high vaginal tears (Odds Ratio (OR) 0.29, CI 0.09-0.97) and neonatal morbidity associated with admission to SCBU (OR 0.72, CI 0.02-0.60), severe neonatal scalp injury (OR 0.14, CI 0.02-0.98) and facial injuries (OR 0.02, CI 0.01-0.04). The factors identified to affect the success of instrumental deliveries were: OP and OT positions of the baby at delivery (OR 0.28, CI 0.17-0.44) and inexperienced operators (OR 0.11, CI 0.02-0.58). CONCLUSION In this study, formal education and training of medical staff did not influence the success rate of instrumental delivery but was associated with improved safety for both mother and baby.

Acupuncture and herbal medicine in in vitro fertilisation: a review of the evidence for clinical practice

The objectives of this systematic review were to determine the effectiveness of (a) acupuncture and (b) Chinese herbal medicine on the treatment of male and female subfertility by assisted reproductive technologies (ART). All reports from RCTs of acupuncture and/or Chinese herbal medicine in ART were obtained via searches through The Cochrane Menstrual Disorders and Sub-fertility Groups Specialised Register of controlled trials, and other major databases. The outcome measures were determined prior to starting the search, and comprised: live birth rate, ongoing pregnancy rate, clinical pregnancy rate, the incidence of ovarian hyperstimulation syndrome and multiple pregnancy, miscarriage rate and adverse effects arising from treatment. Overall, 14 trials (a total of 2670 subjects) were included in the meta-analysis. The results provided no evidence of benefit in the use of acupuncture during assisted conception. Further studies should attempt to explore the potential placebo, as well as treatment, effects of this complimentary therapy. Essential elements for a quality RCT will be the size of the trial, the use of a standardised acupuncture method and of placebo needles.

A review of techniques for adhesion prevention after gynaecological surgery

Purpose of review To explore recent developments in the techniques used for the prevention of adhesion formation after gynaecological surgery as well as the current evidence for existing agents and techniques. Recent findings Recent developments are promising new biomaterials such as polyvinyl alcohol gel and hyaluronic acid cross-linked with various agents such as nanoparticles. Other substances that have recently received attention include novel anti-inflammatory agents, Oxiplex (FzioMed, Inc., San Luis Obispo, California, USA), sildenafil, statins and also, there has been some renewed interest in dextran. Furthermore, the combination of barrier and pharmacological agents has led to the introduction of interesting new hybrid systems. Finally, despite the development of many novel antiadhesion agents, good surgical technique remains the mainstay of adhesion prevention. Summary There is preliminary evidence to support the use of hyaluronic acid, although the best preparation is yet to be determined. The use of icodextrin, Interceed (Ethicon Inc, Somerville, New Jersey, USA) and Oxiplex seem to be justified by the currently available data. The results of interesting new technologies such as the use of hybrid systems and new forms of biomaterials are awaited.