Freezing of embryos and sperm

As a result of IVF and ICSI treatments, there are often more embryos obtained than can be transferred into the uterus at a time.

The rest of the embryos of good quality can be frozen and stored in liquid nitrogen (kryo-preservation) for a long period of time. The freezing of embryos enables subsequent attempts at pregnancy without a new hormonal stimulation.

Before the transfer of the frozen embryos the endometrium of the uterus is increased by oral medication.

The frozen embryos are thawed the day before the planned embryo transfer. Not all embryos survive the freezing and thawing process and it is possible that embryo transfer will not take place.

The survival rate of embryos frozen at our clinic is 60-70%. It is also possible to freeze sperm for subsequent use.

 In AVA CLINIC also actively using vitrification as a new method of embryos and genetic material freezing.
 

Vitrification - a special, extra-fast method of oocytes and embryos cryopreservation, which almost completely excludes the formation of ice crystals and minimize the damage of cells.
 

So far as the embryo consists of water for 95%, during slow freezing microscopic crystals of ice are formed in cells, which can injure the cells of embryos, and due to its high speed of freezing water immediately turns into a gelatinous state,  which excludes the possibility of damage to most cells.