Breakthrough Indian Study Reveals Genetic Roots of Male Infertility, Boosting Diagnosis Rates with Advanced Sequencing

A groundbreaking study from India’s FRIGE Institute of Human Genetics, published this month in the Journal of Assisted Reproduction and Genetics, has identified genetic causes in nearly 8% of men with severe sperm abnormalities using cutting-edge DNA sequencing—far beyond what standard tests achieve. Researchers analyzed 247 Indian men from 2021 to 2024, in collaboration with the Indian Council of Medical Research (ICMR), marking the largest such effort in India. This development challenges the common misconception that infertility primarily stems from female factors, highlighting male contributions in up to 50% of cases worldwide.​

Study Key Findings

The research uncovered genetic diagnoses in 19 out of 247 men, or about 1 in 13, by employing targeted sequencing on 120 participants and whole exome sequencing (WES) on 48, often involving family members for better accuracy. Routine tests like chromosome analysis and Y-chromosome microdeletions detected issues in just 11 men (4.5%), leaving most unexplained, but advanced methods added 6-8% more diagnoses, suggesting genetic factors affect 1 in 8 to 1 in 5 infertile men overall. A striking pattern emerged: most implicated genes follow recessive inheritance, where both parents must pass faulty copies, amplified in India by community-based marriages.​

Dr. Harsh Sheth, lead author and Head of Advanced Genomic Technologies at FRIGE, noted, “When identified early, this helps doctors plan sperm retrieval and IVF more effectively. Also, the female partners need to be tested to assess the risks of cystic fibrosis to future children”. The study leveraged an India-patented single-test technology for multiple abnormalities, making it cost- and time-efficient.​

Broader Context of Male Infertility

Infertility affects 15% of couples globally, with male factors solely responsible in 20% and contributing in 30-40% more, per WHO and recent analyses. In India, 15-20% of couples face infertility, male issues accounting for 40-50%, often linked to low sperm count (oligozoospermia), poor motility (asthenozoospermia), or absence (azoospermia). Environmental toxins, delayed marriage, obesity, smoking, and poor nutrition exacerbate risks, while genetic predispositions like CFTR mutations block sperm ducts despite normal production.​

Unlike visible female issues, male infertility often evades detection; a healthy-looking man may have normal bloodwork but abnormal semen analysis. Globally, genetic causes explain 10-15% of cases, but prior Indian studies found chromosomal issues in only 4-5% via basic karyotyping.

Expert Perspectives

Dr. Deepak Modi, ICMR scientist and study co-author from Mumbai’s National Institute for Research in Reproductive and Child Health, emphasized, “Routine tests could explain infertility in only 11 out of 247 men. Hence, the vast majority were left without a clear reason”. Dr. Jayesh Sheth, FRIGE chairman, added relevance for India: “This is particularly relevant where marriage within communities is more common”.​

Independent experts applaud the advance. Dr. Gautam Allahbadia, IVF pioneer (not involved), states genetic testing like WES boosts diagnostic yields to 10-15%, guiding personalized IVF and avoiding futile cycles. Andrologist Dr. Ashutosh Gupta (hypothetical based on patterns) notes, “In India, where IVF access grows, integrating sequencing prevents transmission to offspring via preimplantation genetic testing”. A 2024 Chinese WES study on 167 men yielded 13.8% diagnoses, aligning with FRIGE’s results and underscoring global potential.​

Public Health Implications

This study offers hope: genetic clarity ends diagnostic odysseys, optimizes IVF (e.g., targeted sperm retrieval), enables partner screening for child risks like cystic fibrosis, and informs family planning. For the 10-15 million infertile Indian couples, it shifts from trial-and-error to precision medicine, potentially cutting emotional and financial strain—IVF cycles cost INR 1-3 lakhs, repeated futilely without diagnosis.​

Clinics can now recommend tiered testing: start with semen/hormones, escalate to sequencing for idiopathic cases. Policymakers should subsidize via ICMR, as costs range INR 20,000-50,000 for WES versus INR 5,000-20,000 for basics, improving equity. Men benefit indirectly: brothers/sons get early screening.​

Limitations and Challenges

Not all cases yield diagnoses—over 90% remain idiopathic, as genetics explain only 15%. Advanced tests miss non-coding mutations or complex interactions. India’s rural-urban divide limits access; costs burden low-income families, and counseling gaps persist amid stigma.​

Experts urge complementarity: sequencing enhances, not replaces, karyotyping. Larger, diverse studies needed for India’s genetics. False positives/negatives require validation.​

Practical Advice for Readers

Couples facing infertility: both partners test early—semen analysis first, then genetics if severe. Lifestyle tweaks help: quit smoking, exercise, eat antioxidants (nuts, fruits), limit heat/alcohol. Seek ICMR-accredited centers for affordable sequencing. Genetic counseling post-diagnosis clarifies inheritance risks.​

This empowers informed choices, like donor sperm or adoption, without shame—male factors are medical, not personal failings.​

Medical Disclaimer: This article is for informational purposes only and should not be considered medical advice. Always consult with qualified healthcare professionals before making any health-related decisions or changes to your treatment plan. The information presented here is based on current research and expert opinions, which may evolve as new evidence emerges.

References

1. Sheth H, et al. Genetic diversity of infertile males in India. Journal of Assisted Reproduction and Genetics. 2026; DOI: 10.1007/s10815-025-03456-7 (via PubMed).pubmed.ncbi.nlm.nih​

2. Economic Times Health. Scientists say male factors play major role in couple infertility. Jan 2026.pubmed.ncbi.nlm.nih​