Male related infertility accounts for 40% of infertility cases in US, due to environmental factors, poor western diet, obesity, smoking tobacco, large alcohol intake and cannabis use all contribute to lowering sperm count and damaging other sperm parameters.

There are four criteria which the sperm’s health is measured:

1. Count: total number of sperm, normal sperm count is 40-250 million/ml
2. Motility: how fast the sperm moving, at least 50% of the sperm should be mobile
3. Morphology: shape of sperm, at least 14% of sperm should have normal shape
4. Sperm DNA fragmentation: which measure the integrity of genetic material in the sperm

How to improve Sperm quality and count:

A 2017 systematic review linked good semen quality with a healthy diet rich in certain nutrients, such as ω-3 fatty acids, antioxidants (e.g., vitamin E, vitamin C, β-carotene, selenium, zinc, cryptoxanthin, and lycopene), and other vitamins (e.g., vitamin D and folate) and low in saturated fatty acids and trans fatty acids.
FERTINUT study shows consumption of 60gr/day of mixture of walnuts, almonds and hazelnuts for three months improve in sperm vitality, motility and morphology. The researchers found that including nuts in a regular diet significantly improved self-reported orgasmic function and sexual desire
An observational study in Denmark showed men who have been taking fish oil supplement of at least 60 days had larger testes, higher sperm volume and higher sperm count.
Also Vitamins C, E, CoQ10, selenium and zinc also improve sperm quality and count.

Can Acupuncture and Chinese Herbs improve Sperm health.

Studies have shown men who received Acupuncture treatments twice a week for at least five weeks had shown improvement in sperm viability, motility and morphology.
Numerous studies have shown that Traditional Chinese medicine herbs such as Cuscuta chinensis Lam., Epimedium brevicornum Maxim., Panax ginseng, Morinda officinalis, Lycium chinense, and ginger reduce reactive oxygen species (ROS), increase sperm motility, and effectively increase conception rates.

References:

1. NPR – Sperm Counts Plummet In Western Men Study Find
2. RBMO Journal 
3. Academic
4. Academic
5. Med Paget Today – Infertility
6. T And F Online – abs
7. Science Direct.com
8. NCBI