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You and your husband both need to be investigated thoroughly for the causative factors leading to infertility
. As you said your periods are irregular and one tube has been removed due to ectopic pregnancy
, it suggests that ovulatory and tubal both factors are causing problems. You need to undergo laparo-hysteroscopy
to determine and treat problems in tubes. If remaining tube is patent, still you can become pregnant naturally/IUI if you are lucky enough. But for that your periods should become normal. If remaining tube is diseased or not patent then IVF is the option for you. With diseased tube there are high chances of ectopic pregnancy. Consult an infertility specialist and go ahead with the treatment according to demand of the situation. Take care.