The mature eggs can be retrieved from the ovaries approximately 36 hours after ovulation. The egg retrieval itself only takes about 10-15 minutes, and you will be given an analgesic during the procedure, so that you will not experience discomfort.
The egg retrieval is done through the vagina with ultrasound guidance. The fertility doctor gently inserts a thin needle through the top of the vagina and into the follicles. These are clustered like a bunch of grapes, and it is therefore most often only necessary to prick once or twice on each side. You are awake and can follow the procedure on the ultrasound screen, but you will probably feel a little drowsy/dizzy from the analgesic you have been given.
After the egg retrieval, you must rest in the fertility clinic for at least half an hour. When you feel ready, you can go home. You will probably feel tired and need to rest for the remainder of the day. You may have some menstrual-like pain, and a little bleeding is also normal.