It takes two (usually) to tango: Fertility problems may be due to the male partner's weight or diet. Johnson says that vitamins C and E, zinc and folic acid help improve sperm health. Sperm motility can also be damaged by smoking, drinking alcohol (including beer) and recreational drug use.

Fish carefully: Don't eat sushi or any raw fish. Avoid fish that have high mercury content due to their environment—including swordfish, tilefish, king mackerel and shark.

Stay fluid: When you don't drink enough water, your cervical fluid (the stuff that helps the sperm find the target egg) becomes sluggish, Johnson points out. The same goes for a man's ejaculate fluid. Drink enough water so that your urine is a light yellow color.

Cut caffeine: High caffeine intake interferes with conception. You may want to consider eliminating it from your diet altogether by avoiding caffeinated coffee, tea and soft drinks (decaf is fine). Once you're pregnant, caffeine also crosses the placenta and can affect the fetus and even cause miscarriage. Stick to no more than two five-ounce cups of regular coffee a day, advises Biasucci-Vianna.