Nobody does a laparotomy for delayed periods. You have mentioned you had an ovarian cyst. I guess that must have been removed during the laparotomy. You have to give us the laparotomy findings and the pathology report of the cyst and whether or not:
(i) the whole of the ovary was removed or just the cyst and
(ii) what was the other looking like at laparotomy and
(iii) was a biopsy taken from the other ovary and what was the pathology report. Based on this information I can answer your question.