Egg collection is done with the help of an ultrasound to ‘see’ the follicles in the ovaries. A needle fits along the side of the vaginal ultrasound probe. The ovaries are usually only 2-5 cm from the top of vagina, so they are easily reached with the tip of the needle. The doctor places the needle into each follicle and the fluid-hopefully with the egg-is gently aspirated into a test-tube. The test tube  is passed to the embryologist to look for the egg under a microscope.