Patient Education · Balaji Horizon
Problems Associated with Unexplained Infertility
Reviewed by Dr. Priyadatt PatelSenior Gynecologist · Advanced Laparoscopic Surgeon · IVF & Endometriosis Programme Lead
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Reviewed by Dr. Priyadatt PatelSenior Gynecologist · Advanced Laparoscopic Surgeon · Last reviewed 29 Sep 2026
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Frequently Asked Questions
What does unexplained infertility mean?
It means standard testing has not identified a cause — not that there is no cause. It is a diagnosis of exclusion, given to about 30% of infertile couples according to ESHRE's 2023 guideline.
Should I see another specialist for a second opinion?
It can help, particularly if you have symptoms that suggest endometriosis, which a routine scan can miss. A good second opinion reviews your history, results and treatment plan carefully — it does not simply add tests, because several extra tests, such as sperm DNA fragmentation or endometrial biopsy, are not recommended when the basic workup is normal.
How long should I wait before starting treatment?
It depends on your prognosis — mainly your age, how long you have been trying and any previous pregnancy. Couples with a good chance of natural conception can reasonably wait for a time; with increasing age or a longer time trying, starting treatment sooner is appropriate.
Should I try IUI or go straight to IVF?
For most couples with unexplained infertility, ESHRE (2023) recommends IUI with ovarian stimulation first. Going to IVF sooner can be reasonable with increasing age, a long time trying or previous unsuccessful treatment — an individual decision made with your specialist.
Can endometriosis be missed in initial testing?
Yes. A routine pelvic scan can miss deep endometriosis, and even an expert scan or MRI cannot rule out endometriosis on the surface of the pelvic lining. If your symptoms suggest endometriosis but scans are normal, your specialist can discuss whether a laparoscopy would change your treatment plan.
Could sperm be the problem even if semen analysis is normal?
Possibly — a standard semen analysis does not measure every aspect of sperm function. Even so, ESHRE advises against sperm DNA fragmentation testing when the semen analysis is normal (2023), and its guidance on repeated IVF failure does not recommend it either. It can be considered for couples with recurrent miscarriage.
Will lifestyle changes help unexplained infertility?
Optimising weight, smoking cessation, alcohol reduction, a healthy, balanced diet and sleep all help fertility modestly. They are essential adjuncts to medical treatment.
What is the cumulative success rate of treatment?
Most couples eventually conceive with one or several treatment approaches. Over several complete IVF cycles, most younger women who continue treatment have a baby; chances are lower in older women and vary from couple to couple.
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