Unfortunately there is a biological clock, and although it starts to tick louder at different times for different people it is very probable that you are going to have some issues over the age of 40. That being said, the only way to find out exactly what your chances of success will be with your own eggs is to have a series of fertility investigations carried out. We will be able to give you a better understanding of your own fertility after that, and then help you decide between the idea of either using your own eggs or those of an egg donor.