Men with type 1 diabetes (T1D) can father healthy children. Optimal glycemic control and preconception care maximize outcomes for both father and child.
Diabetes Effects on Male Fertility
- Sperm Quality: Hyperglycemia → oxidative stress → DNA fragmentation, reduced motility, abnormal morphology.
- Erectile Dysfunction: Autonomic neuropathy, vascular disease – 35–75% prevalence in T1D.
- Retrograde Ejaculation: Autonomic neuropathy – semen enters bladder.
- Hypogonadism: Low testosterone (primary or secondary) – reduces libido and spermatogenesis.
- Seminal Fluid: Altered cytokines, advanced glycation end-products (AGEs).
Preconception Optimization (3–6 Months)
- Glycemic Target: HbA1c <7% (ideally <6.5%) – reduces sperm DNA damage.
- Complication Screening: Retinopathy, nephropathy, neuropathy, CVD.
- Medication Review: Insulin analogs safe; discontinue statins, ACEi/ARB if partner pregnant.
- Supplements: Antioxidants (vit C/E, CoQ10, zinc, selenium) – may improve sperm parameters.
- Lifestyle: Smoking cessation, alcohol moderation, weight optimization, scrotal cooling.
Partner Pregnancy Considerations
- Maternal glucose control critical (preconception HbA1c <6.5%).
- Paternal T1D does not increase fetal anomaly risk directly (no teratogenicity).
- Genetic risk: Offspring T1D risk ~3–6% (vs. 0.4% general); higher if both parents affected.
Assisted Reproduction
- IUI/IVF/ICSI if male factor infertility.
- Sperm DNA fragmentation testing (SCSA) guides ICSI vs. IVF.
- Testicular sperm extraction (TESE) if azoospermia.
Multidisciplinary team: Endocrinologist, urologist/andrologist, reproductive specialist, diabetes educator.
