The matured egg is expelled by the ovary every month during [[1]].

The matured egg is expelled by the ovary every month during ovulation.

During ovulation, a sexually mature female organism will release an egg from one of the ovaries. This egg is captured by the fimbriae of the fallopian tube.

Ovulation occurs approximately once every menstrual cycle and is triggered by a surge in Luteinizing hormone in the body. The matured egg is then transported through the fallopian tube for fertilization.  

The timing of ovulation can vary from person to person and can be influenced by factors such as stress, illness, and changes in weight.