Be Careful. You are speaking of th e"Rhythm Method" where you avoid intercourse on the fertile days. From what I have heard, it is very tricky.....I would look into alternate birth control methods before I tried that.......especially if you are not sure you want a baby.
saute some garlic, pork, onions and tomatoes. mix in green vegetable of choice (swamp cabbage/vine spinach-Filipino vegetable). mix with cooked mung beans. let it soften, then serve while hot. great with fish sauce
