It sounds like the ideal solution for older women wanting to have children . A controversial method to improve the health of an old egg is being used by a Massachusetts-based fertility company . The firm , OvaScience , says its technique involves rejuvenating an egg 's mitochondria , which are the tiny structures that create energy to run a cell . Massachusetts-based fertility company , OvaScience , says its technique involves rejuvenating an egg 's mitochondria , which are the tiny structures that create energy to run a cell . Studies suggest that 23-33 is the ideal time to conceive , as a healthy woman is still fertile and may be more psychologically prepared to have a baby . But fertility does begin to diminish slowly from the age of 25 as a woman 's eggs decrease . One report claiming that women are 10 per cent less fertile at 27 . This is because they now have fewer eggs to fertilise - a few thousand - which are also older . But according to a report by Tia Ghose in LiveScience , experts advise caution over those claims . 'They 're quite private and secretive about what they 're doing , ' Dr Aimee Eyvazzadeh , a fertility specialist told LiveScience . The technique , dubbed Augment , takes energy-producing mitochondria from a patient 's own 'EggPC cells ' . These are immature egg cells found in the protective ovarian lining , which are added to the patient 's mature eggs to supplement the existing mitochondria . ' A key component of egg health is the number of functioning mitochondria in the egg since mitochondria are the source of energy that helps an egg develop , ' OvaScience co-founder , Michelle Dipp , told DailyMail.com . The idea is that immature cells with their healthy mitochondria could rejuvenate ageing eggs . Studies suggest that 23-33 is the ideal time to conceive , as a healthy woman is still fertile and may be more psychologically prepared to have a baby . The method , dubbed Augment , takes energy-producing mitochondria from a patient 's own EggPC cells . These are immature egg cells found in the protective ovarian lining , which are added to the patient 's mature eggs to supplement the existing mitochondria . But fertility does begin to diminish slowly from the age of 25 as a woman 's eggs decrease . One report claiming that women are 10 per cent less fertile at 27 . This is because they now have fewer eggs to fertilise - a few thousand - which are also older . The Augment treatment is not available in the US as the Food and Drug Administration ( FDA ) has n't approved the method . It is , however , available in some in vitro fertilisation clinics in Canada , the UK , the United Arab Emirates and Turkey . So far , more than 150 patients have received the Augment treatment . But there are still problems with the method . For instance , Kateryna Makova , a genomicist at Pennsylvania State University in State College told LiveScience that the follicles in the ovary are unlikely to be in any better condition . As yet , there are no any published studies proving the existence of the precursor cells the company says it uses . OvaScience has yet to respond to Dailymail.com regarding criticism of its procedure .
OvaScience says it has found a way to boost an egg's mitochondria . Aimee Eyvazzadeh are the tiny powerhouses that create energy to run a cell . It involves taking immature egg cells found in protective ovarian lining . These are inserted into the patient 's mature eggs to rejuvenate them . But the company has been criticised for failing to back up their claims .