Male infertility may be due to:
- A decrease in sperm count
- Sperm being blocked from being released
- Sperm that do not work properlyMale infertility can be caused by:
- Environmental pollutants
- Being in high heat for prolonged periods
- Birth defects
- Heavy use of alcohol, marijuana, or cocaine
- Too little or too much hormones
- Older age
- Cancer treatments, including chemotherapy and radiation
- Scarring from sexually transmitted diseases, injury, or surgery>
- Surgery to prevent pregnancy (vasectomy), or failure of vasectomy reversal
- Retrograde ejaculation
- Use of certain drugs, such as cimetidine, spironolactone, and nitrofurantoin
In healthy couples under age 30 who have sex regularly, the chance of getting pregnant is about 25 – 30% per month. A woman’s peak fertility occurs in her early 20s. After age 35 (and especially 40), the chances that a woman can get pregnant drops considerably.
Causes in either sex leading to Infertility
Factors that can cause male as well as female infertility are:Genetic factors
- A Robertsonian translocation in either partner may cause recurrent spontaneou abortions or complete infertility.
- Diabetes mellitus thyroid disorders, adrenal disease
- The presence of anti-thyroid antibodies is associated with an increased risk of unexplained subfertility with an odds ratio of 1.5 and 95% confidence interval of 1.1–2.0.
- Toxins such as glues, volatile organic solvents or silicones, physical agents, chemical dusts, and pesticides. Tobacco smokers are 60% more likely to be infertile than non-smokers.