What are the potential causes of declining sperm counts worldwide?

Is taurine made from bulls' testicles? No. The amino acid taurine, which is ... Instead, it is a purely synthetic substance produced by pharmaceutical companies, ... Semen, also known as seminal fluid, is a bodily fluid that contains spermatozoa which is secreted by the male gonads (sexual glands) and other sexual organs ... Last year, a piece of news from France, which reported that the transformation of stem cells into sperm cells with a developed tail structure had been achieved ... Apr 7, 2025 ... Semen, fluid that is emitted from the male reproductive tract and that contains sperm cells, which are capable of fertilizing the female's ... Feb 25, 2016 ... A team of Chinese researchers reports turning a dish of a certain type of mouse stem cell into spermlike cells, which then were used to fertilize eggs and ... Most of the fluid in semen is made up of secretions from male reproductive organs. Semen contains citric acid, free amino acids, fructose, enzymes, ... Oct 17, 2019 ... But an estimated 30% of infertility cases are deemed “male-factor infertility,” meaning eggs aren't an issue at all. So let's dive into the “ ... Sep 13, 2017 ... Scientists have been able to observe sperm cells since the invention of the optical microscope. But capturing their unique swimming motion ... The experimental unit was made of two insemination doses of 100 mL each, with 3×10(9) spermatozoids. Insulin used was NPH-human, added at the time of ... The urethra carries both urine and sperm. Seminal vesicles — these are 2 small glands above the prostate gland that make up much of the fluid in semen. Brain — ...