Thank you for taking the time to reply.
Rise in temperature does indicate ovulation. This can be correlated with other signs like ovulation pain at mid-cycle or changes in cervical mucus. The cervical mucus at the time of ovulation becomes sticky and can be pulled into a thread. The most accurate is ultrasonographic monitoring of ovulation. Consult your Doctor for difficulty in conceiving, as there may be other factors involved.
Hope this helps. Take care and good luck.