How is unexplained subfertility managed?

Unexplained subfertility is diagnosed when standard investigations (ovulation, tubal patency, semen analysis) are all normal.

Management options include continued attempts with lifestyle optimisation for a period, and (if not successful, or with longer duration/older age) proceeding to in vitro fertilisation (IVF); ovarian stimulation with IUI is sometimes used but evidence is limited.

Clinical relevance. Knowing how unexplained subfertility is managed (expectant approach, then IVF) provides a rational pathway when no cause is found.

More Detail

Management of unexplained subfertility

Unexplained subfertility is a diagnosis of exclusion with a stepwise approach.

Definition

• No cause found after standard investigations - confirmed ovulation, patent tubes, and a normal semen analysis are all normal.

Management

• Continue trying with lifestyle optimisation (weight, smoking, alcohol, timing intercourse) for a period - many will conceive (a reasonable expectant approach, considering the woman's age and duration of subfertility).
• IVF is the main effective treatment when conception has not occurred after a defined period, or with longer duration of subfertility or older maternal age.
• Ovarian stimulation with intrauterine insemination (IUI) is sometimes offered, though the evidence of benefit over expectant management is limited.

Approach

• Decisions are individualised - balancing the woman's age, duration of subfertility, and preferences, with appropriate counselling and support.