For many couples in India, the journey to parenthood through IVF does not end with a first cycle. Or a second. The experience of repeated IVF failure, a clinical reality affecting a significant proportion of those who pursue assisted reproduction, is one of the most emotionally and financially draining situations a family can face. Repeated implantation failure, broadly defined as the absence of a clinical pregnancy after two or more IVF cycles with good quality embryos transferred, is estimated to occur in approximately 10 to 15 percent of IVF patients globally. In India, where patients often access fertility treatment later and with fewer prior evaluations, the proportion may be higher. The causes are multiple, interacting and critically, often identifiable if the right investigations are carried out. Yet many couples undergo cycle after cycle without a systematic review of why previous attempts failed.
| “When a couple comes to me after three or four failed IVF cycles at other centres, the first thing I do is go back to the basics. Were the embryos truly good quality, not just by appearance but by genetic integrity? Was the endometrial lining adequately prepared and at the right receptive window? Was the uterine cavity thoroughly evaluated? In a majority of cases, we find something that was not adequately addressed. This is not a criticism of previous treatment, it reflects the fact that repeated failure requires a different, more exhaustive level of investigation.”
— Dr Nishi Singh, Head of Fertility and IVF Expert, Prime IVF Centre, Gurgaon |
Embryo quality is the most studied factor in implantation failure. Chromosomally abnormal embryos, a frequency that rises sharply with maternal age, account for a significant proportion of implantation failures and miscarriages. Preimplantation genetic testing for aneuploidies, or PGT-A, allows clinicians to identify and select euploid (chromosomally normal) embryos for transfer, substantially improving outcomes in patients with recurrent failure. Endometrial receptivity is the second major area of investigation. The endometrium is receptive to an embryo only during a specific window, typically days 20 to 24 of a natural menstrual cycle. This window shifts in some women, meaning a standard transfer protocol may be transferring embryos at the wrong time. The endometrial receptivity analysis, or ERA test, uses molecular profiling of the endometrial lining to precisely identify a woman’s personalised implantation window, allowing the transfer to be timed accordingly.
Structural uterine factors, submucosal fibroids, endometrial polyps, uterine septum, adhesions or adenomyosis, can physically impede implantation and are sometimes detected only with specialised investigations such as 3D ultrasound or hysteroscopy.
| “Endometrial PRP, or platelet-rich plasma therapy, has emerged as a valuable option for women with thin endometrial lining, a condition that makes implantation very difficult. Similarly, MACS sperm selection, which filters out sperm with fragmented DNA, makes a measurable difference in embryo quality for couples with a history of poor fertilisation or early embryo arrest. These are not experimental procedures — they are evidence-supported tools that can change the outcome for couples who have been through profound disappointment.”
— Dr Nishi Singh, Head of Fertility and IVF Expert, Prime IVF Centre, Gurgaon |
Immunological factors are also receiving growing attention. Natural killer cell activity, antiphospholipid antibodies and other immune-mediated mechanisms can interfere with implantation or cause very early pregnancy loss that is not detected by conventional testing. Specialised reproductive immunology panels are now available at advanced fertility centres and can guide treatment with immunomodulatory therapies.
Thrombophilia, inherited or acquired clotting disorders, represents another under-investigated cause of implantation failure and recurrent miscarriage. Conditions such as Factor V Leiden mutation, MTHFR variants and antiphospholipid syndrome can disrupt blood flow to the implanting embryo and the developing placenta. Anticoagulation therapy during IVF cycles has been shown to improve outcomes in patients with identified thrombophilic conditions. The psychological toll of repeated failure is substantial and clinically significant. Studies show that women who have experienced three or more failed IVF cycles exhibit levels of anxiety and depression comparable to those seen in cancer patients. Psychological support, counselling and mind-body integration programmes are now considered part of evidence-based care for this group, not optional extras.
For couples who have experienced repeated failure, the message from specialists is consistent: more treatment is not always better treatment. What is needed is a deeper, more systematic evaluation, and a centre with the expertise, technology and commitment to use that information to build a genuinely different protocol for the next attempt.
