Stimulated IVF- A woman takes medicines/injections for 9 to 12 days to stimulate both of her ovaries to generate and mature multiple egg follicles. During the stimulation phase, a physician will do ultrasounds to track the follicles growth until they reach a specified size (18-22mm).
Natural IVF- In this cycle, instead of stimulating your ovaries to produce multiple eggs, the Natural Cycle IVF Process is meant to select that one egg that your body produces naturally.