Today, more and more couples are leaving having children until later. However, many do not realise that "later" can also mean "too late", because the older we get, the harder it becomes. An increasing number of people trust in the success of artificial fertilisation, but, even though reproductive medicine is constantly making progress, the much-heralded biological clock cannot be turned back. The body eventually puts a natural limit on how long it is possible to have children. Since evolution has not made any changes to this, nothing can replace planning a family while there is still time. This book investigates the reasons a growing number of people are childless today. It explains in detail, using medical facts, what reproductive medicine can today achieve, and what it cannot. It analyses the options for success, as well as the limits of reproductive medicine.