Medscape is an online resource for health professionals.
Their page on Pelvic Organ Prolapse (POP) can be found here: Pelvic Organ Prolapse.
As with all of their pages on health conditions, it includes an overview, workup and treatment guide. All of these are very detailed, and based on up-to-date information.
If you are a GP, you may not have traditionally made screening for and treating POP part of your practice. It may not have been a large focus of, or even a part of, your training. However, as awareness of POP grows, you may find an increasing number of women seeking treatment for the condition - after all, it effects up to half of your female patients who have given birth.
This resource is a great place to start your professional reading about prolapse.