Yes, but you don’t know when. If no ovulation has occurred, then pregnancy is impossible because fertilization is impossible. That's the evidence, although it is more logical than biological. No egg, no zygote. That's how oral contraceptives work: no egg is released.

It is a bad idea to try to guess when ovulation has occurred to avoid pregnancy. This is called the rhythm method and it is notoriously unreliable.

Incidentally, it sounds from your description that you are thinking that the last egg is still around when the next one is expected. That is not the case. The window for fertilization is a few days after ovulation, while the egg is coming down the Fallopian tube. If fertilization doesn't occur then, and the egg is shed, then pregnancy is not possible for nearly a month. Most of the month there is no egg there to be fertilized.

The typical female can only conceive at most five days out of her cycle, beginning immediately following ovulation, which is usually about two weeks after the last menses. But don't bet on it unless you want to be called mama. She is infertile for the rest of the cycle.

It is wisest to consider yourself liable to get pregnant most of the cycle, although during and immediately following menses is the safest time.