A woman’s ovaries house hundreds of potential eggs. Each month, during the natural ovulation cycle, the ovary selects just one egg from a pool of 100-1,000. Those eggs which are not selected undergo a natural cell death process called atresia. When a woman uses fertility medication, the body’s natural selection process is overridden, and a number of these otherwise unused eggs are allowed to grow. As many as 20 eggs may be stimulated in a given cycle. Thus when using fertility medication in the IVF process, not only is the woman not using up all of her eggs, but she is ‘rescuing’ eggs that otherwise would have undergone atresia.