If you’ve ever wondered whether eating fish could impact your fertility the answer is “yes it can.” EPA and DHA, two important fats in fish were found to correlate with fertility. In this study, they found a correlation between infertile patients and low levels of EPA and DHA. However, eating fish is not the best option. This is one of the rare cases where supplements are better than food. Fish tends to be contaminated with heavy metals that can damage your fertility. In this case, taking fish oils is beneficial for many people (note that fish oils are very bad for some people, depending on the inflammation level). Make sure you use a company that checks every batch. There’s a game where cheaper fish oils are claiming to be mercury free, etc. but they only test their fish every so often. It’s not lying but very misleading and can be dangerous. Also, supplementing with DHA only won’t do the trick, you need EPA as well. In our clinic we use Telomere Labs, which we find is also very tolerable for patients in terms of not burping them up. Another company is Ascenta that has good oils and checks every batch.
 
Hum Fertil (Camb). 2009 Mar;12(1):28-33