Cutting-Edge Technology Used at Oak Clinic

Our hospital actively presents its own research at domestic and overseas academic societies and treatises, and incorporates new theories and technologies from overseas academic societies. This page introduces a few of those.

IVM (In-vitro maturation culture)

When oocytes are immature, there is no way for them to be fertilized. With IVM, we can make some oocytes become mature so that fertilization is possible. Normal IVM is performed by collecting immature oocytes. "Rescue IVM" is performed when the collected oocytes are unexpectedly immature.

Ultra-Rapid Vitrification with Slush Nitrogen

Generally, the collected oocytes are frozen in liquid nitrogen. We are investigating that the use of slush nitrogen, which can freeze more rapidly than liquid nitrogen, can be expected to further improve the pregnancy rate.


If you wish to become pregnant using frozen oocytes, you will need to thaw the oocytes and perform intracytoplasmic sperm injection to fertilize them.
At that time, insemination while observing the position of the mitotic spindle using a special microscope called Polscope may prevent damage to the mitotic spindle and increase the pregnancy rate.