What is the recommended stepwise approach to infertility assessment and management, including primary, secondary, and tertiary evaluations, cause-specific treatments, and fertility control options?

Stepwise Approach to Infertility Assessment and Management

Initial Evaluation Timeline

Begin infertility evaluation after 12 months of unprotected intercourse in women under 35 years, or after 6 months in women 35 years and older 1, 2, 3. This time-bound approach is critical because approximately 15% of couples fail to conceive within 12 months, and delayed evaluation particularly impacts older women where ovarian reserve declines rapidly 1.

Primary Care Level: Basic Diagnostic Workup

Male Partner Assessment (Mandatory First Step)

All couples must undergo male evaluation simultaneously with female assessment—never delay male workup as this leads to unnecessary, costly, and invasive female treatments 2. The male factor contributes to 50% of infertility cases 1, 2.

Essential male evaluation includes:

• Semen analysis (SA) following WHO reference values—this is the cornerstone test 1, 2
• If first SA is abnormal, repeat at least once, one month apart (semen parameters are highly variable) 2
• If SA is normal by WHO criteria, a single test suffices 1
• Physical examination focusing on testicular size, epididymal consistency, and vas deferens presence 2
• Reproductive history including prior pregnancies, sexual function, medication use, environmental/occupational exposures 1, 2

Female Partner Assessment

Required first-line tests include 3:

• 3D ultrasound with antral follicle count (single examination)
• Tubal patency assessment via hysterosalpingography or HyFoSy
• Anti-Müllerian hormone (AMH) assay prior to assisted reproduction
• Vaginal swab for bacterial vaginosis

Do NOT perform as first-line 3:

• Hysterosonography or diagnostic hysteroscopy if 3D ultrasound is normal
• Post-coital testing (no longer recommended)
• Chlamydia trachomatis serology (insufficient predictive value for tubal patency)

Secondary Care Level: Advanced Diagnostics

When Semen Analysis is Abnormal

If two SAs show abnormalities, proceed with 1, 2:

• Andrologist examination
• Hormonal evaluation (FSH, testosterone, LH)
• Testicular ultrasound
• Karyotype testing if: primary infertility with azoospermia OR sperm concentration <5 million/mL with elevated FSH or testicular atrophy 2
• Y-chromosome microdeletion testing at revised thresholds per updated guidelines 2

Distinguishing Azoospermia Types

Obstructive azoospermia indicators 2:

• Normal testicular size, fully descended
• Dilated/indurated epididymides bilaterally
• FSH <7.6 IU/L
• Low volume (<1.4 mL), acidic pH (<7.0) suggests distal obstruction (CBAVD or ejaculatory duct obstruction)

Non-obstructive azoospermia indicators 2:

• Atrophic testes
• FSH >7.6 IU/L
• Spermatogenic failure

Female Advanced Evaluation

Laparoscopy is recommended before age 30 when initial workup shows no abnormalities (increases natural pregnancy rates) 3.

Pelvic MRI indications include evaluation for endometriosis, leiomyomas, or previous pelvic infection when ultrasound is inconclusive 2, 4.

Tertiary Care Level: Cause-Specific Treatments

Male Factor Management

Varicocele 5, 6, 7:

• Surgical repair is recommended when varicocele is identified
• This is a key, potentially treatable condition emphasized across guidelines

Genital tract inflammation/infection 8:

• Antibiotics and probiotics for documented infections (present in 43-48% of cases)
• If inflammation persists: low-dose corticosteroids plus antioxidants
• This comprehensive approach reduced idiopathic infertility to 8% in one large cohort 8

Hypospermatogenesis 8:

• FSH treatment for documented hypospermatogenesis

Antioxidant supplementation 1, 5, 6:

• The WHO guideline takes a neutral stance—no recommendation for or against 5
• May be considered for oxidative stress related to poor lifestyle (smoking) or environmental exposure 1
• Evidence remains insufficient for definitive recommendation

Female Factor Management

Ovulatory dysfunction/PCOS 5:

• Ovulation induction agents (6 specific recommendations in WHO guideline)
• Do NOT use ovulation induction in normo-ovulatory women with unexplained infertility 3

Tubal disease 5, 3:

• Hydrosalpinx requires surgical management (salpingotomy or salpingectomy based on tubal score) before ART 3

Uterine factors 3:

• Operate on polyps >10mm, submucosal myomas (types 0,1,2), and synechiae before ART
• Uterine septa and isthmoceles: insufficient evidence for routine surgery

Intrauterine insemination (IUI) 3:

• When indicated by abnormal workup, use gonadotropin stimulation with ovulation monitoring to prevent multiple pregnancies

Unexplained Infertility

Treatment options 5, 4:

• Intrauterine insemination (IUI)
• In vitro fertilization (IVF)
• 6 specific treatment recommendations provided in WHO guideline 5

Failed ART or Recurrent Pregnancy Loss

Evaluate male partner with 2:

• Karyotype testing
• Sperm DNA fragmentation testing
• Referral to male reproductive specialist

Prevention and Lifestyle Modifications

Strongly recommend to all couples 1, 2, 5, 3, 4:

• Smoking cessation (tobacco and cannabis)
• Alcohol limitation to <5 glasses per week 3
• Mediterranean-style diet with balanced nutrition
• Physical activity
• Weight loss if obese (though no specific BMI threshold contraindicates treatment) 3
• Reduce sexually transmitted infection risk 5
• Minimize environmental and occupational exposures 2

Fertility Control Options

Temporary/Reversible Methods

Standard contraceptive counseling applies when fertility preservation is desired while addressing modifiable risk factors.

Permanent Methods

Donor sperm, donor eggs, or adoption may be necessary when:

• Severe genetic abnormalities are identified (Klinefelter syndrome, Robertsonian translocations) 2
• Non-obstructive azoospermia without successful sperm retrieval
• Life-threatening conditions are discovered during evaluation 2

Critical Implementation Points

Common pitfalls to avoid:

• Delaying male evaluation while pursuing female testing
• Performing unnecessary invasive female procedures when basic workup is normal
• Using ovulation induction in normo-ovulatory women
• Accepting "idiopathic" diagnosis without comprehensive andrological assessment (reduces to 8% with proper evaluation) 8
• Relying on single abnormal semen analysis
• Using point-of-care or mail-in semen tests as definitive (no substitute for specialized andrology laboratory) 2

The evidence base remains limited for many interventions 1, 5, with most recommendations conditional due to low or very-low certainty evidence. However, this structured approach, prioritizing simultaneous couple evaluation and targeted treatment based on specific diagnoses, achieves 40.9% spontaneous pregnancy rates even in couples with previous ART failure 8.