i can name one example:

Cystic fibrosis patients often have missing or obstructed vas deferens (the tubes that carry sperm). In fact, in men whose infertility is caused by an inborn missing vas deferens have a 60% chance that they carry the gene for cystic fibrosis (even if they don't have the disease itself).

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Also, Klinefelter syndrome patients carry two X and one Y chromosomes (the norm is one X and one Y), which leads to the destruction of the lining of the seminiferous tubules in the testicles during puberty, although most other male physical attributes are unimpaired.

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example:

Kartagener syndrome, a rare disorder that is associated with a reversed position of the major organs, also includes immotile cilia (hair-like cells in lungs and sinuses that have a structure similar to the tails of sperm). Sperm motility may then also be impaired by this condition.

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here's also one: Polycystic kidney disease, a relatively common genetic disorder that causes large cysts to form on the kidneys and other organs during adulthood, may cause infertility as the first symptom if cysts develop in the reproductive tract.

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all of them are so called genetic disorders. This pathological condition caused by an absent or defective gene or by a chromosomal aberration. Also called hereditary disease, inherited disorder.

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oh thanks for the ideas guys... this can help my husband as well ;D

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this is scary.. after reading cystic fibrosis by nicemom_26, got scared for my husband..better to see a doctor for him asap

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