You should start now, both for yourself and your dp. It takes 3 monthes for sperm to be produced, so he should be taking a good multi w/ lots of zinc for good quality sperm. For your self, make sure to be getting your folic acid (it's a b vit) and omega 3's, a good multi, vitex is a wonderful herb for regulating your hormones, and hence, your cycle. Try getting your vitamins from a health food store, they will be more expensive, but will be much better quality. It's great that you are thinking ahead (I wish I had been smart enough to do that when I was young)! GL!