We always hear about the need for women to maintain a healthy weight for reproduction, but new evidence from Denmark shows that information relating to a man’s weight is passed to his children in his sperm and that this could make them more likely to be obese themselves.
The researchers tested the sperm of obese men who were going through weight-loss surgery and found that there were changes in their sperm afterwards. The changes they found in the sperm were linked to the genes which relate to appetite control and brain development.
This was a very small study so would need more research, but it does suggest that it really is important for men to do all that they can to keep fit and healthy when they are trying to conceive. You can find the summary of the article, published in the Journal Cell Metabolism, here.