Hi. I'm 32 years old. I had a myomectomy when I was 27. After that docs found that my fallopian tubes are blocked. I had gone through ivf and are blessed with twin boys. They are three now. My periods are regular but I observe lower abdomen pain in the middle of the month during ovulation period. The pain is mostly on the left side, sometimes on the right also. This pain is for almost four cycles. I had this pain before ivf also. I consulted few docs they said it could be that tubes are rupturing with the muscles. But now this has become regular. The pain lasts for a day only. What is the cause of this pain?