Until recently, almost all vocational education took place in the classroom, or on the job site, with students learning trade skills and trade theory from accredited professors or established professionals.
Spironolactone (Aldactone) may be used with other medicines to treat high blood pressure and heart failure. It may also help people who have too much aldosterone, a hormone, or people who have edema (fluid retention) from heart, liver, or kidney disease. Certain antidepressants may lower testosterone levels.
Plastics: Bisphenol A (BPA), an additive to plastics found in many household products, can lower sperm counts and motility. A 2008 study in the journal Fertility and Sterility showed that men with high concentrations of BPA in their urine also had low sperm counts.