Ovolution is releasing of eggs from ovaries. When follicles textures and releases picture cells from ovaries than starts involution. Involution is very important in life cycle. After ovolution egg cell become appropriate for fertilisation.
Ovolution can be define briefly as release of a mature egg cell from overy into Fallopian tube in order to fertilise with sperm.
In a overy when a egg cell become matures then it releases into Fallopian tube and wait for sperm and uterus. In order to fertilisation sperm is important.
The lining of the uterus become thicked if it can prepare a fertilised egg. If there happen no fertilization occur uterine lining and blood will shed.