One of the biggest advances in assisted reproduction has been the development of protocols for the cryopreservación (freezing) of embryos and gametes as strategies to improve success rates in infertility treatments.
Cryopreservation has been around since 1984 and the storage of cryopreserved embryos is standard practice in clinical in vitro fertilization (IVF).
The purpose of this procedure is to have embryos available for transfer after thawing in a subsequent menstrual cycle, either natural or artificially prepared. This allows us to increase pregnancy rates per cycle of stimulation without lengthy and costly repeat stimulation cycles with gonadotropins and oocyte aspiration. It also avoids the disposal of surplus embryos, and may prevent the transfer of a high number of embryos decreased the risk of multiple pregnancy.
This is an alternative when conditions pose a risk for embryo transfer as is the case of severe ovarian hyperstimulation.
However, not all embryos survive the freezing thaw process and it can happen that few if any embryos survive to be transferred. The risk of fetal abnormalities is not elevated with respect to natural conception.
Requirements to store embryos in the bank:
- Both to women and men are required to test for HIV antibodies, surface antigen for hepatitis B, hepatitis C antibodies, serology and IgG / IgM for cytomegalovirus and Chlamydia trachomatis.
- An informed consent and embryo storage contract, must be signed in order to avoid potential problems with regard to ownership and disposition of the embryos, which may inevitably occur at the time of a missing a partner or a break up. The storage contract can be extended in view that the time in storage does not seem to affect the viability of cryopreserved embryos.
The medical staff at inSer will be available to answer any concerns you can have about this procedure.