Unexplained Infertility — Causes, Diagnosis & Treatment Options in Hyderabad

Q: What is unexplained infertility?

Unexplained infertility is diagnosed when a couple has been trying to conceive for 12 months (or 6 months if over 35) and standard fertility tests — semen analysis, ovulation testing, fallopian tube assessment, and uterine evaluation — all return normal results.

Q: Can IUI treat unexplained infertility?

Yes. IUI (Intrauterine Insemination) combined with ovarian stimulation is often the first treatment for unexplained infertility. It increases the chance of egg and sperm meeting by placing washed sperm directly into the uterus around ovulation.

Q: Is unexplained infertility treatable at Mother Hospitals?

Yes. Mother Hospitals & IVF Center has a structured protocol for unexplained infertility — starting with IUI and advancing to IVF as needed. Dr. E. Prashanthi Reddy also investigates possible hidden causes including sperm DNA fragmentation, NK cell activity, and endometrial receptivity (ERA test).

What Unexplained Infertility Really Means

"All your tests are completely normal" — these words should be reassuring, but for a couple who has been trying to conceive for over a year, they can feel incredibly frustrating. This is the reality of unexplained infertility: a diagnosis of exclusion, meaning no cause has been found — yet.

At Mother Hospitals & IVF Center, Boduppal, Dr. E. Prashanthi Reddy understands the emotional weight of this diagnosis. "Unexplained infertility does not mean there is no cause," she explains. "It means we have not found the cause using standard tests. With advanced diagnostic tools and the right treatment strategy, most of these couples can achieve pregnancy."

How Is Unexplained Infertility Diagnosed?

To receive a diagnosis of unexplained infertility, all of the following standard tests must return normal results:

Semen analysis: Normal sperm count, motility, and morphology
Ovulation confirmation: Regular menstrual cycles, normal progesterone levels, AFC on ultrasound
Fallopian tube assessment: Normal HSG (hysterosalpingogram) or laparoscopy showing open tubes
Ovarian reserve testing: Normal AMH, FSH, and antral follicle count
Uterine evaluation: Normal uterine cavity on ultrasound or hysteroscopy

Only after all these tests come back normal — and after 12 months of trying (or 6 months if you are over 35) — is unexplained infertility diagnosed.

Possible Hidden Causes That Standard Tests Miss

Just because standard tests are normal does not mean the cause doesn't exist. Several factors can cause infertility without being detected by routine testing:

Sperm DNA fragmentation: Sperm may look normal under a microscope but have damaged DNA that prevents successful fertilisation or embryo development
Egg quality issues: Poor egg quality not detectable by AMH or AFC
Implantation failure: The embryo may not implant due to immune factors, clotting disorders, or a displaced implantation window
Subtle endometriosis: Mild endometriosis can be missed on ultrasound and HSG but affects the peritoneal environment
Luteal phase defect: Insufficient progesterone support after ovulation
Peritoneal factors: Inflammatory cells in pelvic fluid that impair fertilisation

Treatment Options for Unexplained Infertility

Option 1: Expectant Management (Watchful Waiting)

For younger couples (woman under 30) who have been trying for less than 2 years, a period of expectant management with lifestyle optimisation may be recommended — as many will conceive naturally within another 12 months.

Option 2: IUI with Ovarian Stimulation

IUI (Intrauterine Insemination) combined with low-dose stimulation injections gives the body a better chance by: producing 2-3 mature eggs instead of 1, and placing washed, concentrated sperm directly into the uterus. Success rates per IUI cycle for unexplained infertility are around 10-20%. Most couples are advised to try 2-3 cycles before moving to IVF.

Option 3: IVF Treatment

IVF is the most effective treatment for unexplained infertility and also provides valuable diagnostic information. During IVF, doctors can observe fertilisation, embryo development quality, and the rate of blastocyst formation — all of which provide clues to what was preventing natural conception. Success rates with IVF for unexplained infertility are 40-55% per cycle for women under 35.

Advanced Testing to Investigate Hidden Causes

At Mother Hospitals, Dr. Prashanthi Reddy may recommend the following advanced tests for couples with unexplained infertility after failed IUI cycles:

Sperm DNA Fragmentation Index (DFI): Assesses DNA damage in sperm
ERA Test: Endometrial Receptivity Assay to identify personalised implantation window
NK Cell Testing: Natural killer cell activity in the uterus
Thrombophilia Screen: Clotting disorders that impair implantation
Diagnostic Laparoscopy: To rule out subtle endometriosis or pelvic adhesions

Emotional Impact and Support

"Normal but not pregnant" is one of the most psychologically challenging situations in fertility care. The lack of a clear diagnosis can leave couples feeling helpless and confused about what to do next. At Mother Hospitals, we emphasise that unexplained infertility is treatable, and the absence of a diagnosis does not mean the absence of hope.

Dr. Prashanthi Reddy and the team at Mother Hospitals provide not just medical treatment but also empathetic counselling to guide couples through this journey with clarity and confidence.

Book a Consultation at Mother Hospitals

All-inclusive IVF at ₹99,000/- · 19+ years expertise · 4.7★ Google rated · ART Act 2021 certified

💬 WhatsApp Us 📞 97059 93366

Frequently Asked Questions

What is unexplained infertility?

Unexplained infertility is diagnosed when standard fertility tests (semen analysis, ovulation testing, tube assessment, uterine evaluation) all return normal results but pregnancy has not occurred after 12 months (or 6 months if over 35).

How common is unexplained infertility?

Unexplained infertility accounts for approximately 15-30% of all infertility cases. It is one of the most common yet frustrating diagnoses — but the right treatment can still achieve pregnancy.

Can IUI treat unexplained infertility?

Yes. IUI combined with ovarian stimulation is often the first treatment recommended. It increases the chance of conception by placing washed sperm directly into the uterus at ovulation time.

Should I go directly to IVF for unexplained infertility?

It depends on your age and how long you have been trying. Women under 35 may try IUI first. Women over 35 or after failed IUI cycles are generally advised to proceed to IVF sooner for better success rates.

Is unexplained infertility treatable at Mother Hospitals?

Yes. Mother Hospitals has a structured protocol for unexplained infertility including IUI, IVF, ERA testing, and sperm DNA fragmentation testing. Contact Dr. Prashanthi Reddy at 97059 93366.