<s>[INST] Hi, I have 2 kids(not normal delivery) and undergone with tubectomy(open surgery) also. I didn t get my periods in the last month. I have checked using the pregnancy kit and it is positive. How it is possible. Is it a doctor mistake that she didn t do properly? [/INST] Hello, Thanks for sharing your health concern with us. I have gone through your query and here are your answers. 1. Any contraceptive procedure, including lobectomy, has a failure rate. This does not mean that the doctor has not performed the procedure correctly. It only means that the tubes have re-canalized after surgery. 2. If you do not wish to continue with the pregnancy, please get further help from a specialist. Either way, you need to see a doctor for further management. 3. If you wish to clarify further, you can go for the estimation of the serum beta-ChatDoctor titles and follow up with a trans-vaginal sonogram. Hope this helps. </s>