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			Concern Treatment Pregnancy Experiences Concern Evaluating Your Fertility Understanding Fertility Maximise Your Fertility Infertility: An Introduction Infertility in Females Infertility in Males Sperm Disorders Anatomical Retrograde Ejaculation Varicose Veins Testicular Cancer Undescended Testis Environment & Lifestyle Unexplained Infertility (Idiopathic) Age Associated Concerns Impotence Implications of Infertility Questions to Ask Your Doctor		Varicose Veins This condition is present in 25-40% of men attending infertility clinics compared with about 10-15% of men in the general population. The pathogenesis of spermatogenesis failure in men with varicocele is largely unknown. One suggestion is that this failure is due to increased temperature, together with accumulation of CO2 and other noxious substances (including adrenal steroids and catecholamines) caused by pooling of blood in the distended veins. The role of varicocele in infertility, especially with respect to its management, is controversial. Infertility due to varicocele sometimes responds to ligation of the dilated blood vessels.
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