Talk to your doctor about the comet assay test, which determines whether the sperm coming in has genetic damage, according to the Huffington Post. Get as much Vitamin D as possible, particularly during the winter months. Stay away from pollutants, such as bisphenol A and polychlorinated biphenyls, or PCBs.
If more than 25 percent of the male's sperm has anomalies in the DNA, consider asking for intracytoplasmic sperm injection, or ICSI, which has to do with picking a sperm cell and injecting it directly into the egg. As of 2015, this procedure is considered experimental, which means that many insurers refuse to pay for the cost, according to the Huffington Post.
Even if sexual activity remains constant, drops in vitamin D can interfere with pregnancy. As of 2015, about 41 percent of Americans have a deficiency. This vitamin balances sex hormones and stimulates their production when necessary. In research studies involving in vitro fertilization, or IVF, people with low levels of vitamin D are significantly more likely not to conceive, states the Huffington Post.
Plastic bottles with the number 3, 6 or 7 in the recycling symbol (or other plastic items with the same recycling symbol) often contain BPA. Women with too much exposure to this chemical often produce fewer egg cells. At higher levels of exposure, the eggs simply degenerate or act unusual in the fertilization process, reports the Huffington Post.