Unexplained Infertility

14.05.2026 Prof. Dr. Cihan Kaya

What is Unexplained Infertility? – Comprehensive Guide

What is Unexplained Infertility?

Unexplained infertility is a condition where pregnancy cannot be achieved despite all standard tests performed on couples yielding normal results. It accounts for approximately 10-20% of infertility cases.

How is it Diagnosed?

This diagnosis is made if ovulation, fallopian tubes, and uterus are normal in women, and sperm analysis is normal in men, yet pregnancy does not occur.

Possible Causes

Microscopic level sperm-egg interaction problems, embryo development issues, implantation disorders, and immunological factors may play a role.

Ovulation Problems

Although appearing normal in tests, ovulation quality or timing may not be optimal in some patients.

Sperm Function Disorders

Even if sperm count is normal, DNA damage or functional problems can affect pregnancy.

Implantation Problems

The embryo's inability to attach to the uterus can be one of the significant causes of unexplained infertility.

Treatment Options

Depending on age and duration, intrauterine insemination (IUI) or in vitro fertilization (IVF) treatments may be applied.

Intrauterine Insemination (IUI)

It is preferred as a first-line treatment in mild cases and can increase the chance of pregnancy.

In Vitro Fertilization (IVF)

It is the most effective treatment method in more advanced cases or after unsuccessful IUI.

Age-Based Approach

While natural attempts may be recommended for a period in younger patients, treatment is planned without delay in older age.

Conclusion

A diagnosis of unexplained infertility does not mean there is no treatment. With proper planning, the chance of achieving pregnancy is high.

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