Methods
This is a prospective randomized study. The study population included were women with primary and secondary infertility registered at our center, fit into the inclusion and exclusion criteria of this study. The total 180 patients were included.
Results
Hysteroscopies were performed in 90 patients with at least one IVF cycle failure and another 90 patients taken as control with similar demographic parameters. The average duration of infertility between both the groups was not significant. Hysteroscopy was able to detect intrauterine pathologies in around 40% of the cases, which were treated in the same treatment phase. Early ultrasound findings with gestational sac and cardiac activity were found to be significant between two groups.
Conclusion
We noticed clinical improvement in IVF success rate after hysteroscopy. Hysteroscopy may be offered to the patients with previous one or more IVF failures, as clinically some of the previously undiagnosed pathologies could be detected and treated to achieve the positive outcomes.
Keywords : Hysteroscopy · Previous failure · In vitro fertilization · Rural
The worldwide in vitro fertilization (IVF) success rate is around 30–40% despite new advancements in treatment methodology since the first IVF baby was born in 1978 [1]. The success of IVF mainly depends on good-quality embryo (seed) and endometrium (soil), whereas hysteroscopy may play a crucial role in an endometrial assessment [2]. The assumed causes of repeated failures can be categorized as (a) factors related to decreased endometrial receptivity, (b) factors related to defective embryonic development, and (c) others (such as endometriosis and presence of hydrosalpinges) [3]. The assessment of the endometrium for intrauterine abnormalities is a core part of evaluation as it may influence the complex process of embryo implantation. Nowadays, a routine 2D/3D ultrasonography (USG) is considered as a preferred tool for assessment of endometrial thickness and its vascularity. But there is a high prevalence (40–50%) of unsuspected intrauterine lesions such as uterine synechiae, uterine septum, endometritis, and uterine polyps in an asymptomatic patient, which were diagnosed by hysteroscopy, in numerous IVF studies noted in studies [3–7]. The presence of such intrauterine lesions may have a significant impact on embryo implantation as well as the pregnancy outcome in patients even after the treatment of their infertility [3]. As compared to transvaginal ultrasonography (TVS), hysteroscopy allows us to directly visualize the unsuspected lesions and to undergo its treatment at the same sitting [7, 8].
There are controversies regarding the use of routine hysteroscopy in all patients prior to an IVF cycle owing to its invasive way of the procedure. According to the international guidelines of the American Society for Reproductive Medicine (ASRM), hysteroscopy should be reserved for those having abnormalities on TVS and hysterosalpingography (HSG) considering its cost-effectivity [9]. This study aimed at assessing the role of hysteroscopy in whom there was no obvious uterine pathology detected on routine USG or HSG with previous IVF failure to detect unsuspected intrauterine lesions responsible for IVF failure in addition to assessing the effect of treating such lesions on the pregnancy outcome.
Aims and ObjectivesThe objectives of this study were (1) to evaluate the use of hysteroscopy in the assessment of uterine pathologies, not evident on ultrasonography (USG) or hysterosalpingography (HSG) in women with previous one or more IVF failures and (2) to determine whether correction of such pathologies during hysteroscopy improves clinical pregnancy rates in these women.
This is a prospective randomized study, which was conducted at Wardha Test Tube Baby Center, a Unit of Obstetrics and Gynaecology Department, at Jawaharlal Nehru Medical College (JNMC) and Acharya Vinoba Bhave Rural Hospital (AVBRH), Sawangi, Wardha district of India, for the duration of one year from September 2020 to August 2021. The patients in this study were included from the rural population registered at our center having primary or secondary infertility who were fulfilling the fixed inclusion and exclusion criteria of our study. The total sample size was 180 patients out of whom 90 patients underwent hysteroscopy and another 90 patients were taken as a control in whom hysteroscopy was not performed. The inclusion criteria were as follows: (1) women under 45 years of age, (2) women who have undergone one or more embryo implantation failures in previous IVF cycles, and (3) women having normal uterine findings on transvaginal USG or HSG. The exclusion criteria were as follows: (1) women aged above 45 years, (2) women undergoing the first cycle of IVF, and (3) women with an already diagnosed intrauterine pathology. In this study, women with primary and secondary infertility with one or more implantation failures were subjected for accurate history and clinical examination and investigated for routine blood and radiological parameters. The written informed consent was obtained prior to the procedure explaining its details, and the selected cases were subjected for hysteroscopy. The hysteroscopic findings such as endometrial adhesions, endometrial hyperplasia, submucous polyp or fibroids, and T-shaped uterus were diagnosed and treated accordingly with its corrective procedures (Fig. 1). These patients then underwent repeated IVF treatment in the next cycle again. The pregnancy outcome of all these patients was recorded by measuring their beta HCG level on day 14 of embryo transfer. The early scan (two weeks after the positive beta HCG test) showing live pregnancy with cardiac activity was recorded. The data were compared for a positive outcome of IVF treatment post-hysteroscopy with that of control subjects.
The hysteroscopy was performed in 90 patients with a history of at least one IVF cycle failure, and another 90 patients were taken as control having almost similar demographic parameters (Table 1). The average duration of infertility between both these groups was founded to be nonsignificant. Although, the hysteroscopy was able to detect intrauterine pathologies in 36 cases (40%), which were treated for its abnormal pathologies in the same sitting, and another 54 cases (60%) were found to have normal hysteroscopic findings. The most common hysteroscopic finding that we noticed in this study was intrauterine adhesions, while endometritis and endometrial polyp were the second most common (Table 2). Following the treatment of this intrauterine pathologies, patient underwent another next embryo transfer, the results of which were noted and compared (Table 3). As compared to 18 out of 54 patients with normal hysteroscopic findings, 24 out of 36 patients with corrected abnormal hysteroscopic findings had a beta HCG positive rate. Thirty-six out of 90 cases of nonhysteroscopy group also showed positive results (Table 4). The gestational sac with cardiac activity was seen in 12 (13.3%) in the normal hysteroscopy finding group, 15 (16.6%) in abnormal hysteroscopy group, i.e., total 27 cases (30%) with hysteroscopy group, but 21 cases (23.3%) without hysteroscopy group (Table 5).
The abnormalities of the uterine cavity may be responsible for adversely affecting the post-IVF pregnancy rates [10]. In such cases, hysteroscopy is the important investigation for the evaluation of the uterine cavity and detecting an undiagnosed pathology inside it. Most of the pathology can be accurately diagnosed with this technique, and subsequently, further management of such pathology can be immediately done along with the biopsy for histopathological examination [11]. According to the literature, some of the authors support the idea of performing hysteroscopy after recurrent embryo transfer failure, whereas some authors do not. Schiano et al. reported the uterine abnormality in approximately 50% of the cases such as cervical abnormalities, endometrial polyps, and submucous leiomyomas, after hysteroscopic evaluation in those patients who had undergone two unsuccessful assisted reproduction techniques (ART) attempts [12]. Elestohy et al. reported such abnormalities in around 44% of his cases [3]. Bakas et al. also diagnosed intrauterine abnormalities in around 43% of the cases [7]. Similarly, Demirol et al. noticed hysteroscopic intrauterine abnormalities in 26% cases [13]. As all these intrauterine masses such as polyps, fibroids, and septum are known to affect the embryo implantation in several ways, such as abnormal vascularization, chronic inflammation, and uterine contractions, it ultimately results in IVF cycle failure.
The age of the patient is also an important factor affecting the chances of getting an abnormal uterine pathology which seems to increase with an advancing age as evident in the literature [6]. Ajayi et al.’s study showed that uterine pathologies were lower in patients with age below 30 years, but its incidence subsequently increased in number with the advancing age above 30 years. Abnormal findings in HSC groups were (a) submucous myoma, (b) endometrial polyp, (c) uterine septum, (d) endometritis, (e) intrauterine adhesions, and (f) T-shaped uterine cavity. This pathology was treated in a respective manner. The management of submucous myoma was done by hysteroscopic myomectomy. Endometrial polyps were treated by polypectomy. The cases of uterine septum were managed with hysteroscopic septal resection. Intrauterine adhesions, the most common pathology in our study, were treated by adhesiolysis, whereas T-shaped uterine cavity was managed using lateral metroplasty.
One should note that the hysteroscopy is also associated with procedural complications such as uterine perforation, excessive bleeding, cervical trauma, fluid overload, and electrolyte imbalance; however, no such complications were noted in any of the patients registered in our study. Also, Pereira et al. reported that there was no significant difference in pregnancy rate and delay in an IVF cycle after hysteroscopy [14]. So, similar to the studies, in this study,we found that performing hysteroscopy before the first IVF cycle, a high number (around 40%) of intrauterine abnormalities were noticed in patients with previous IVF failure which were undiagnosed previously even after conventional TVS and HSG. All the post-hysteroscopy diagnosed abnormalities were effectively treated in our cases. The embryo transfer during IVF may fail to implant, which depends on the quality of embryo, receptivity of the endometrium, and integrity of the uterus. For the uterine integrity and other pathologies, we can assess by hysteroscopy and endometrial biopsy. In our study, we found a clinical increase in pregnancy rate in patients where endometrial abnormalities were evaluated and effectively treated.
The results of our study are compared with other similar eight studies found in the literature (Table 6). The overall analysis showed that the clinical pregnancy rate was positively higher in the HSC group compared with that in the non-HSC group (Table 6). Regarding miscarriage rate, only four studies provided miscarriage rate data and were included in the analysis (two were RCTs and two were NRS). The results revealed no significant difference in the miscarriage rate between the two groups (HSC and Non-HSC), which was in contrast to our results where the miscarriage rate was more in the control group. The overall analysis of the implantation rate revealed that it was significantly higher in the HSC group compared with the control (non-HSC) group (Table 6).
Declarations
Conflict of Interest The authors declare that they have no conflict of
interest.
Ethical Approval Ethical approval from institutional ethical committee, JNMC and AVBRH, Wardha, was taken.
Informed Consent Informed consent was obtained from all individual participants included in the study.
