BBT's and natural planning for fertility are not that effective when you're breast-feeding because you are not likely ovulating regularly. Just enjoy this year of bonding with your baby and breast-feeding, also enjoy sex with your partner without stressing about keeping track. Focus on your own health, Maintaining a good exercise routine a healthy diet and continuing to take prenatal vitamins with folic acid. Most women start to ovulate when they're no longer nursing exclusively- usually after six or eight months when they're adding some solid foods to the babies diet.