However, there are some easy way to tell if your swimmers are on top form. As well as improvements in sperm count and shape, the researchers examined the quality of DNA inside the sperm. For more information on cookies please refer to our cookies policy. The research, published in the prestigious journal Ecology Letters, used crickets to pit the sperm of several males against each other in the competition to fertilise the female's eggs. This is because a chemical called bisphenol-A BPA can leach from plastics and seap into your food.
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Want stronger, healthier sperm? Eat your nuts
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