The Problem Is Not That You Cannot Have a Baby. It Is That Nobody Has Told You Why Yet.
1 in 4 couples in India struggling to conceive never find out what is actually causing the problem. They wait. They try. They blame themselves. The biology stays unaddressed.
Infertility involves female factors in 40 to 50% of cases, male factors in 30 to 40%, combined factors in 10 to 15%, and unexplained causes in the rest. That last number matters most. Many couples are told everything is “normal” when the tests simply have not gone deep enough.
Here is what actually causes infertility, what tests find it, and what treatment looks like.
Female Infertility Reasons: What Is Actually Going On
PCOS (Polycystic Ovary Syndrome)
The most common cause of ovulatory infertility in India. PCOS disrupts the hormonal signals that trigger ovulation, so no egg is released. No egg, no fertilization. PCOS is treatable and pregnancy is achievable with the right protocol.
Blocked Fallopian Tubes
If both tubes are blocked, sperm cannot reach the egg. Tubal blockage is often caused by past pelvic infections, untreated STIs, or previous abdominal surgery. Many women have no symptoms at all until they try to conceive. A test called HSG (hysterosalpingography) diagnoses this.
Endometriosis
Tissue similar to the uterine lining grows outside the uterus, causing inflammation, scarring, and adhesions that block tubes or impair egg quality. Many women are diagnosed only when they try to conceive.
Low AMH (Diminished Ovarian Reserve)
AMH measures how many eggs remain. Low AMH does not make pregnancy impossible. It means the protocol needs precise calibration and time matters more than usual.
Thyroid Disorders
Both hypo and hyperthyroidism interfere with ovulation and raise miscarriage risk. One of the most commonly missed causes of infertility in India because thyroid is often managed without considering its reproductive impact.
Uterine Abnormalities
Fibroids, polyps, and a septate uterus prevent implantation even when fertilization happens normally. Identified through ultrasound or hysteroscopy.
Male Infertility Causes: The Half of the Equation Nobody Tests
Recent data confirms male and female factors contribute almost equally to infertility. Despite this, in most Indian households the woman sees a doctor first. Sometimes the only one.
Low Sperm Count (Oligospermia)
Normal sperm count is above 15 million per ml. Below that, fertilization probability drops with every cycle.
Poor Sperm Motility (Asthenospermia)
Count can be normal but if fewer than 32% are moving progressively, they cannot reach the egg effectively.
Abnormal Sperm Morphology (Teratospermia)
Sperm shape determines its ability to penetrate an egg. Severely abnormal morphology is a common finding in unexplained fertilization failure.
Varicocele
Enlarged veins in the scrotum raise testicular temperature and damage sperm production. Found in approximately 35 to 40% of men with primary infertility and one of the few male causes that is surgically correctable.
Sperm DNA Fragmentation
Not tested in a standard semen analysis. High fragmentation causes fertilization failure and early embryo arrest even when count and motility look normal. The most underused and most important male fertility test in India.
Lifestyle Factors
Smoking, alcohol, obesity, and prolonged heat exposure all damage sperm quality. These are preventable. Most men are never told.
Unexplained Infertility: When All Tests Come Back Normal
Around 15 to 20% of couples are told their results are normal after basic testing. This is called unexplained infertility and it is one of the most frustrating diagnoses to receive.
What it usually means: the standard tests were not thorough enough.
Basic semen analysis misses DNA fragmentation. Basic panels miss subtle thyroid shifts. Basic ultrasounds miss small polyps. Advanced testing including ERA (Endometrial Receptivity Analysis) and immune markers often finds what basic panels cannot.
Infertility Diagnosis Tests: What You Should Actually Get Done
For Women:
- Day 2 or 3 hormonal panel: FSH, LH, estradiol, prolactin
- AMH test: ovarian reserve
- Antral follicle count: via transvaginal ultrasound
- HSG (Hysterosalpingography): tubal patency
- TSH: thyroid function
- Pelvic ultrasound: fibroids, polyps, PCOS morphology
- Hysteroscopy: if uterine abnormality is suspected
For Men:
- Semen analysis: count, motility, morphology
- Sperm DNA fragmentation test
- Hormonal panel: FSH, LH, testosterone, prolactin
- Scrotal ultrasound: varicocele
Both partners should be tested before any treatment begins. A woman going through IUI cycles while her partner’s sperm DNA fragmentation is untested is not a complete treatment plan.
Age-Related Fertility Decline: The Number That Changes Everything
Female fertility begins declining meaningfully after 32 and drops sharply after 37. Not about menopause. About egg quality and quantity, both non-negotiable and age-dependent.
Mumbai and Bengaluru saw a 25% increase in women seeking fertility treatment after 35 in 2025 to 2026. Most wished they had come earlier.
For men, sperm DNA fragmentation increases significantly after 45. Paternal age now features in fertility assessments at leading clinics.
When to See a Fertility Specialist in India
- Under 35: after 12 months of trying
- Age 35 to 37: after 6 months
- Age 38 and above: after 3 months
- Immediately: known PCOS, endometriosis, blocked tubes, varicocele, or prior pregnancy loss
Do not wait for a GP referral. Fertility specialists run targeted workups that general physicians are not equipped to conduct.
FAQs: Infertility Causes and Diagnosis
- What is the most common cause of female infertility in India?
– PCOS-related anovulation, followed by tubal blockage and diminished ovarian reserve. - Is male infertility as common as female infertility?
– Yes. Male factors contribute to 30 to 40% of infertility cases. Combined male and female factors account for another 10 to 15% - What does unexplained infertility mean?
– It means standard tests found no obvious cause. It does not mean nothing is wrong. Advanced testing usually reveals the answer. - Which test checks if fallopian tubes are blocked?
– HSG (Hysterosalpingography). A dye is passed through the tubes under X-ray to check for blockage. - Does thyroid affect fertility?
– Yes. Both over and underactive thyroid disrupt ovulation and increase miscarriage risk. TSH should be part of every female fertility workup. - At what age does fertility decline significantly?
– For women, meaningfully after 32 and sharply after 37. For men, sperm DNA quality declines after 45.
Treatment at Candor IVF Starts With the Right Diagnosis
At Candor IVF, we do not start treatment before we finish diagnosis. Both partners. Complete workup. Written findings.
Because a treatment plan built on incomplete information is not a plan. It is a guess.
Candor IVF, Surat. The first consultation is honest, thorough, and free.
Book your fertility assessment today.
Dr. Jaydev Dhameliya is an IVF consultant and reproductive medicine specialist with over 17 years of clinical experience helping couples on their journey to parenthood. He holds an MBBS and DGO, and is a Fellow in Minimal Access Surgery (FMAS), a trained laparoscopic surgeon. As Founder and Director of Candor IVF, he specialises in IVF, infertility treatment, laparoscopic gynaecological surgery, and high-risk pregnancy management. Every article he authors or reviews reflects current medical evidence and his hands-on patient experience.
