IVF and Asherman Syndrome: How Scarring Affects Treatment

Author : Ritu Agarwal | Published On : 30 Jun 2026

Asherman syndrome, the formation of intrauterine adhesions or scar tissue within the uterine cavity, represents one of the more clinically demanding uterine conditions that IVF patients can encounter. Unlike many of the structural issues discussed elsewhere in this series, which involve a discrete and removable lesion such as a polyp or fibroid, Asherman syndrome involves a fundamental disruption of the endometrial tissue itself, where scar tissue replaces the functional glandular and stromal endometrium that embryo implantation depends on. Its management requires a different category of surgical skill and its prognosis depends heavily on the severity and extent of the scarring present.

For couples who have been diagnosed with Asherman syndrome or who are investigating unexplained implantation failure that may have this condition as its underlying cause, understanding what causes intrauterine adhesions, how the severity of scarring is assessed, what treatment involves, and what realistic expectations for fertility restoration look like provides the clarity needed to navigate what can otherwise feel like an overwhelming and uncertain diagnosis.

What Causes Intrauterine Adhesions

Asherman syndrome develops when trauma to the endometrium, typically affecting the deeper basal layer from which the functional endometrium regenerates each cycle, triggers a healing response in which fibrous scar tissue forms within the uterine cavity rather than normal endometrial regeneration occurring. These adhesions can range from thin, filmy bands that partially bridge the cavity to dense, fibrous tissue that completely obliterates the cavity space.

The most common cause of Asherman syndrome is curettage performed after a pregnancy event, particularly dilation and curettage following a miscarriage or for retained products of conception after delivery. The endometrium is particularly vulnerable to adhesion formation when curettage is performed within four to six weeks of pregnancy, when the basal layer is in a uniquely fragile and regenerating state. Repeated curettage procedures, such as those sometimes performed for recurrent miscarriage management, substantially increase the risk compared to a single procedure.

Other recognised causes include uterine surgery such as myomectomy, particularly when fibroids are removed from opposing walls of the cavity creating raw surfaces that can fuse together during healing, caesarean section, especially when complicated by infection or haemorrhage requiring additional instrumentation, and severe pelvic infection including endometrial tuberculosis, which can cause extensive and often particularly treatment-resistant adhesion formation.

The clinical presentation of Asherman syndrome varies with severity and can include reduced or absent menstrual flow, cyclical pelvic pain without bleeding in cases where adhesions trap menstrual blood within isolated portions of the cavity, recurrent pregnancy loss, and infertility. However, a meaningful proportion of cases, particularly milder ones, produce no obvious symptoms and are only discovered during the investigation of unexplained infertility or recurrent IVF failure.

How Asherman Syndrome Impairs Fertility and IVF Outcomes

The fertility impact of intrauterine adhesions operates through several mechanisms that scale with the severity of the condition. In its mildest form, isolated thin adhesive bands may have minimal impact on the overall functional cavity area and may produce only subtle reductions in implantation probability. In its most severe form, complete cavity obliteration eliminates essentially all functional endometrial surface area, making implantation effectively impossible regardless of embryo quality.

The mechanical effect of adhesions is straightforward: scar tissue occupies space within the cavity that would otherwise be available for embryo implantation, and depending on its location can directly interfere with normal embryo positioning during transfer. Beyond this mechanical effect, the areas of the uterine wall covered by adhesions lack the normal endometrial glandular tissue required for the secretory transformation, the production of implantation-supporting factors, and the vascular development that the endometrium must undergo to support a pregnancy. Even the portions of the cavity that remain free of visible adhesions in moderate to severe cases may show impaired endometrial development, reflecting damage to the underlying basal layer that extends beyond what is visually apparent as scar tissue.

For IVF specifically, this means that even a technically excellent embryo, including a chromosomally normal blastocyst confirmed through PGT-A, may fail to implant or may implant in a compromised location with inadequate vascular support if it is transferred into a cavity significantly affected by adhesions. This is one of the situations in this series where addressing the uterine factor before transfer is not merely beneficial but can be the single determining factor in whether any embryo, however excellent, has a realistic chance of becoming a pregnancy.

Diagnosis and Severity Classification

Diagnostic suspicion for Asherman syndrome typically arises from the clinical history, particularly reduced menstrual flow following a curettage procedure, combined with imaging or direct visualisation findings. Hysterosalpingography can demonstrate filling defects within the cavity and irregular cavity contour, while saline infusion sonohysterography can show similar findings with the advantage of avoiding radiation exposure, though both of these investigations have limitations in fully characterising the extent and density of adhesions present.

Hysteroscopy remains the definitive diagnostic and classification tool, as direct visualisation allows the surgeon to assess the location, extent, density, and vascularity of adhesions, and to classify the severity according to established staging systems used in reproductive surgery. These classification systems generally grade severity based on the percentage of cavity involvement, whether the adhesions are filmy or dense, and whether the tubal ostia and upper cavity regions are involved, with this staging directly informing both the surgical approach required and the prognosis that can realistically be communicated to the patient.

Mild disease, involving thin filmy adhesions affecting a small proportion of the cavity, generally carries a favourable prognosis for both successful surgical correction and subsequent fertility outcomes. Severe disease, involving extensive dense adhesions with significant cavity obliteration, particularly when the tubal ostia and upper cavity are involved, carries a substantially more guarded prognosis and may require multiple surgical procedures with uncertain ultimate restoration of normal cavity function.

Treatment: Hysteroscopic Adhesiolysis

The standard treatment for Asherman syndrome is hysteroscopic adhesiolysis, the surgical division of adhesions under direct visualisation using fine scissors, specialised instruments, or in some cases electrosurgical or laser energy, performed with the goal of restoring the cavity to as close to its normal size and shape as possible while minimising further trauma to the surrounding healthy endometrium.

This is a surgically demanding procedure that requires considerable expertise, particularly in more severe cases where the normal anatomical landmarks of the cavity may be distorted or obscured by extensive scarring, and where the risk of uterine perforation is meaningfully elevated compared to routine hysteroscopic procedures. The surgeon must work carefully to identify and preserve any remaining healthy endometrium while dividing the fibrous bands that are restricting the cavity, often guided simultaneously by abdominal ultrasound or laparoscopy to reduce perforation risk in complex cases.

Following adhesiolysis, preventing the adhesions from reforming during the healing process is a critical part of treatment. Several strategies are used in combination, including the placement of a temporary intrauterine device, balloon catheter, or specialised anti-adhesion barrier gel within the cavity for a period of days to weeks following surgery to physically keep the walls of the uterus separated while the endometrium heals. Extended estrogen therapy is typically prescribed for several weeks to months following surgery to actively stimulate endometrial regrowth across the areas where adhesions were removed.

For more severe cases, a single surgical procedure is often insufficient to achieve complete cavity restoration, and a staged approach involving repeat hysteroscopic procedures at intervals of several weeks, each addressing any adhesions that have begun to reform, may be required to progressively improve the cavity over multiple sessions.

What Outcomes Look Like After Treatment

The prognosis following treatment for Asherman syndrome correlates strongly with the initial severity of the disease. For mild to moderate cases that respond well to surgical correction, subsequent pregnancy rates, whether through natural conception or IVF, can approach those of women without a history of intrauterine adhesions, particularly when the restored cavity shows good endometrial development on follow-up assessment.

For severe cases, particularly those with extensive adhesions affecting the majority of the cavity or involving the tubal ostia, outcomes are more variable. Some patients achieve a meaningful restoration of functional cavity space and go on to conceive successfully, while others, despite technically successful surgery, continue to show limited endometrial development reflecting permanent damage to the basal layer that surgery cannot reverse. In these more challenging cases, a frank conversation about realistic expectations, including the possibility that gestational surrogacy may eventually need to be considered if the cavity cannot be adequately restored despite multiple surgical attempts, is an important part of compassionate clinical care.

Following successful adhesiolysis, a follow-up hysteroscopy or sonohysterography is typically performed to confirm cavity restoration and assess endometrial development before proceeding with an IVF cycle. Many fertility specialists also recommend allowing the endometrium an adequate recovery period, often several months, before attempting embryo transfer, to give the regenerating tissue the best opportunity to achieve normal thickness and receptivity.

Why This Diagnosis Deserves a Specialist's Specific Expertise

Asherman syndrome is not a condition where general hysteroscopic competence is sufficient. The technical demands of safely and effectively dividing extensive adhesions, the judgement required to know when to stage treatment across multiple procedures rather than attempting complete correction in a single session, and the post-operative management protocols that meaningfully reduce reformation risk all require a level of specific experience that varies considerably between practitioners and centres.

Connecting with an experienced Fertility Clinic in Jaipur with genuine expertise in operative hysteroscopy for intrauterine adhesions, access to the imaging and surgical resources required for safe and effective adhesiolysis, and a thoughtful, staged approach to more severe cases ensures that this technically demanding condition is managed by a team equipped to give you the best realistic chance of a restored, functional uterine cavity.

Final Thoughts

A diagnosis of Asherman syndrome can feel discouraging, particularly given that it often arises from a procedure performed during an already difficult experience such as a miscarriage. But for many patients, particularly those with mild to moderate disease, skilled surgical treatment restores a cavity capable of supporting a successful pregnancy. Even in more severe cases, a staged and carefully managed treatment approach can achieve meaningful improvement.

Understanding the severity of your specific case, the realistic prognosis it carries, and the level of surgical expertise required to address it gives you the foundation to engage with your treatment plan as an informed and active participant rather than a passive recipient of an uncertain diagnosis.

For expert assessment and treatment of intrauterine adhesions, with the surgical skill and post-operative care protocols that give your uterine cavity the best chance of restoration, a trusted IVF Hospital in Jaipur with genuine experience in complex hysteroscopic surgery and a commitment to honest, individualised prognosis gives your fertility journey the specialised care this diagnosis requires.

Disclaimer: This article is intended for informational purposes only and does not constitute medical advice. Please consult a qualified fertility specialist for guidance tailored to your individual diagnosis and treatment needs.