HI,
Ovulation occurs only once in a given cycle. Ovulation tracking can be done with help of ovulation calendar or ovulation detection kits. A single tube is sufficient to achieve a pregnancy if it is normal and patent. The chances of pregnancy are more when ovulation occurs on the side of the normal tube. Hope this helps.
The answer is based on information provided. Exact advice is not possible without a proper examination and investigations. You are requested to consult your Doctor. Take care and keep us posted.