Momfromcanada, breastfeeding can actually act as contraception, even if your periods have come back, so it might take a bit longer to conceive – my doctor explained it as your body stops you ovulating as it knows you already have a baby -he said it was a natural contraception, but obviously not the kind of contraception you would rely on! Also, for me (I breastfed for nearly 10 months, I found my periods took a few cycles to really readjust properly), Hope that helps!