Is it possible for the quality of a mans sperm to cause a miscarriage?

"In men, sperm are continuously produced by cells in the testicle. Workplace hazards may cause reproductive problems in a number of possible ways:
the cells and tissue in the testicle may be damaged so that sperm cannot be produced at all or not in large enough numbers for fertility
the hormones necessary for sperm production and sexual function may be decreased
the sperm themselves may be damaged
the nerves on which orgasm and ejaculation depend may be damaged.
Agents which damage sperm are particularly worrying because many do so by damaging the genetic material carried in the sperm (that is, they cause mutations).

If this occurs and that sperm fertilises an egg, then an abnormal pregnancy may occur. Miscarriage early in pregnancy, death of the foetus later in pregnancy or the birth of a child with some sort of abnormality are likely.


The three possible consequences for men from exposure to reproductive hazards are:
impaired sexual activity (e.g. loss of interest, impotence)
infertility (i.e. inability to father children despite normal sexual activity)
fathering an abnormal pregnancy and possibly a child born with abnormalities."

REFERENCES
1. Reproductive Hazards. State of the Art Review. Occupational Medicine. Vol. 9 No.3 July-Sept 1994
2. Westerholm, P. Pregnancy and the Working Environment. Joint Industrial Safety Council, Sweden, 1994
3. Winder, C. Protective legislation and discrimination in employment in the Australian lead processing industry. Journal of Occupational Health and Safety Australia New Zealand, 1988, 5(2): 121-128.