The<unk>  is an observed increase in male infertility since the mid-1970s. The issue attracted media attention following an influential 2017 meta-analysis that found that sperm counts had declined by 52.4% between 1973 and 2011. The<unk>  is particularly prevalent in Western countries such as New Zealand, Australia, Europe and North America. It has also been observed in non-western countries such as China. The decline in male fertility is an actively researched and debated topic. Proposed explanations for the decline in sperm counts include lifestyle factors, such as diet, and environmental endocrine disruptors, such as plastic. Some scientists have called into question the extent of the<unk> , pointing out that sperm-count studies are geographically sparse, often fail to account for the subject's age, and use the single metric of sperm count as a predictor of male fertility. However, the scientific community generally accepts that it is a key issue of male health.
Male infertility crisis
Exercise amenorrhoea
Salpingitis isthmica nodosa
Ovarian apoplexy
Pelvic congestion syndrome
Functional hypothalamic amenorrhea
Ovarian torsion
Female infertility