Because anesthesia is used for egg retrieval, patients feel nothing during the procedure. Egg retrieval is a minor surgery, in which a vaginal ultrasound probe fitted with a long, thin needle is passed through the wall of the vagina and into each ovary. The needle punctures each egg follicle and gently removes the egg through a gentle suction. Anesthesia wears off quickly once egg retrieval is concluded. Patients may feel some minor cramping in the ovaries that can be treated with appropriate medications.