Hi there,
If itās really true that your wife has a thyroid problem (and it probably is) she will have to do more than take kelp supplements. Cut out sugar, white flour, trans fats and vegetable oils completely, and up your intake of healthy fats, especially cod liver oil (at least 1 teaspoon daily), high vitamin butter from pasture fed cows, and coconut oil (1 tablespoon before each mealātake it in warm water, herbal tea, or in your food). I recommend the book Eat Fat, Lose Fat by Sally Fallon and Mary Enig. Itās not just a weight loss book, itās also a health recovery book. They go into great detail about the above fats and how they put an end to numerous ailments, including low thyrid function. The cod liver oil should be taken in combination with butter or it may not be as effective. Kelp tablets did not work for me. They are intended to add iodine to your diet, but unrefined celtic sea salt is so much better for iodine as well as numerous other trace minerals. The NFP book says sea salt doesnāt contain iodine so you have to buy refined iodized salt, but take caution: your body will not be able to assimilate this artificial iodine. Your body will in fact absorb trace amounts of iodine very well from unrefined sea salt. Many sea salts are refined so read the labels carefully. I found celtic sea salt not in the salt section but with the seaweed and international foods at my local health food store. My cycles are now very normal, by the way, whereas they used to be crazy. Real nutrition really does work. If you fix the thyroid problem, you will not have to abstain so much.
Also, during this time when you are waiting for her period to return, I was told by my NFP teachers (and it worked perfectly, but I was breastfeeding) that when you detect cervical mucus, you should wait that day plus two more. If you detect two days, wait those two days plus three more, if you detect three days, wait those three days plus four more. You should never have to wait more than four days after a patch has ended. God bless you for hanging in there.