How does ovulation occur with only one tube? do i only ovulate when the ovary with the tube decides to ovulate?

No you ovulate every: Cycle. However, it is very unlikely when you ovulate on the side without the tube (presuming you have both ovaries still) you'll become pregnant. That ovum will eventually just die. If you only have one tube and one ovary, then that is the only active ovary and in each cycle you have the same chance of pregnancy as a woman with both ovaries.

No.: Ovulation has nothing to do with the tubes. Women who have had a hysterectomy and have no tubes still ovulate. That is an ovarian function.

Tubes don't ovulate: You ovualte from your ovaries. The egg that is released is then carried down your fallopian tubes where fertilization can occur. Women with one fallopan tube can still receive the egg from the opposite ovary. It is able to travel through the peritoneal cavity.