For the past 50 years, sperm counts in men have declined by half around the world, experts warn.
Researchers reveal poor semen quality is a contributing factor in 50% of infertility cases, according to a report by the Daily Mail.
Despite the new data, too many women assume they are the one with the infertility issue and rush into treatment, which is very costly.
"Women are often quick to blame themselves if they don't get pregnant, and overlook the fact that it is increasingly likely that the problem lies with their partner," Dr Catherine Hood, a Harley Street consultant in psychosexual medicine, told the Daily Mail.
She calls for a review of treatment guideline to address the rise in male infertility.
Dr Hood also believes couples should explore less invasive infertility treatments like intracervical insemination (ICI), which uses the Dr Hood explained: “In clinical trials, ICI has a success rate of around 20% and can be performed in a home setting, which is far less stressful than attending a hospital or fertility clinic."
The research was originally published in the journal Reproductive Biology and Endocrinology.