Hi Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern.
As per your query,Severe or prolonged emotional stress,Increased workload,decreased night sleep & even stress about
infertility, might interfere with hormones needed to produce sperm.
There can be many more reasons behind less
sperm count & motility
1.Medical causes such as
Varicocele ( swelling of the veins that drain the testicle), Infection of testicle, Hormone imbalances,Defects of tubules that transport sperm.
2.Environmental causes such as overexposure to certain Industrial chemicals(benzenes, toluene, xylene, pesticides, organic solvents, etc),
Heavy metal exposure,
Radiation or X-rays & Overheating the testicles can also cause less sperm count & motility
3.
Smoking tobacco, Drinking alcohol, Using certain illicit drugs are other factors known to reduce sperm count & motility
Hope your query is solved
Get well soon