As our cultural and medical understanding of sperm health and male fertility grows, our sperm quality and quantity declines. A study published last year (https://academic.oup.com/humupd/article-abstract/23/6/646/4035689?redire…) found a hefty decline in sperm counts between 1973 and 2011, a 50-60% drop in this time; dramatic to say the least. Most disturbing is there are only theories and notions as to what is the actual cause of this steep decline. Sperm production is a complicated biochemical process and to assess the variables that are in play in it’s healthy production is difficult. Usually studies will look at one or two chemicals or variables to see how they affect sperm health. These types of studies will often show concrete correlations between phthalate exposure and sperm health (https://www.ncbi.nlm.nih.gov/pubmed/29024969), or stress levels and lower testosterone (https://militarymedicine.amsus.org/doi/pdf/10.7205/MILMED-D-11-00053). However, to have a full picture of the situation is extremely difficult, and all we can do now is investigate trends and specific factors that may be contributing.