Diet is just one of many aspects that need to be addressed when planning a healthy conception. In terms of foods to boost fertility, every woman is going to be different with their nutritional requirements.
However, I work closely with acupuncturists (in particular Maggie Godin who is a fertility expert) and the traditional chinese medicine approach is to build good blood flow and volume.
The most important ingredients in a blood building food is iron, vitamin B12 and folic acid. Good blood tonic foods are often red/orange or deep green including: beetroot, silverbeet, sweet potato, pomegranate, persimmon, tamarillo, swiss chard, spinach, kale, parsley, watercress, turnip, collard greens, mustard and dandelion greens.
In western nutrition, green vegetables benefit liver which is responsible for blood production. They include nutrients such as Vitamin A, carotene and Provitamin A which aid in their synthesis within the liver.
Other great blood production foods are: Spirulina, seaweeds, micro-algae, grass fed, lean red meats such as beef, lamb and duck, oysters, raisins, prunes, apricots and mushrooms.