Can you provide insight into the next potential breakthrough in IVF that may reduce costs, be less invasive, and maintain optimal pregnancy rates?
I am very excited about recent breakthroughs in in vitro maturation (IVM) of oocytes. The bottleneck in IVF clinics (and significant expense) primarily relates to the need to stimulate the ovaries to get mature and competent eggs. The technology of IVM has existed for decades but has yet to be fully embraced by clinics because of the poor competency of oocytes matured in the laboratory.
Immature eggs resume meiosis immediately upon removal from the ovary. Nuclear maturation of eggs in the lab is easy. In fact, it happens too quickly, thereby not allowing for the maturation of the egg cytoplasm. This has previously led to poor development of embryos following fertilization and low success rates.
Recently, a new laboratory strategy has resulted in a significant improvement in success. This improved culture system uses a peptide that prevents the resumption of meiosis for the initial culture time frame. Substances, including follicle stimulating hormone, can be added to the media to promote oocyte cytoplasmic maturation. Following this, the eggs are placed in a media without the meiosis inhibitor to allow for nuclear maturation. This results in a significantly higher proportion of competent mature eggs.
Dr. Trolice is director of The IVF Center in Winter Park, Fla., and professor of obstetrics and gynecology at the University of Central Florida, Orlando.