"Cryopreservation is the freezing and storing of leftover embryos from a recent round of an in vitro fertilization cycle. This process usually involves embryos that are in preimplantation condition or after fertilization has already occurred. This type of in vitro fertilization procedure is often preferred because it does not require the woman to go through the full and lengthy IVF Cycle.
How exactly does the Cryopreservation process work?
Cryopreservation is a different way to use the widely accepted process of using a liquid nitrogen bath to lower the embryos to sub-zero temperatures in order to preserve them over long periods of time and then thaw them out when it is time to use them. The major difference with Cryopreservation is that the embryos were considered leftovers after a completed IVF cycle. This means that they were already fertilized. So, this also means that when they are thawed out that they would be ready for implantation via in vitro without having to go through the whole long process.
What would be the benefits of using the Cryopreservation process?
There are a number of distinct benefits of using the Cryopreservation process method for freezing the embryos. One of the biggest known advantages is the more rapid freezing during the vitrification process has shown to be less damaging to the embryo and it improves implantations rates exponentially over the slower freezing of standard freezing methods.
An even bigger benefit to Cryopreservation is the part that the embryos are already fertilized so that there is no need for the woman to go through the long drawn out and quite expensive full IVF cycle treatment. It also improves the likelihood that at least one of the implanted embryo will take and lead to a full term pregnancy the first time.
History of using frozen embryos
The use of implanting frozen embryos in vitro began back in 1983, but, unfortunately, the pregnancy was spontaneously aborted and only made it to 10 weeks gestation. It was not until the following year that the very first frozen embryo was used and led to a full term birth in 1984. Since then more than a million babies have been born using embryos that have been frozen using a highly specialized controlled temperature process that drops the temperature to a sub-zero level. After having been frozen for a long period the embryos are thawed out in order to be able to implant them.
The earliest cryopreservation method was accomplished in 1978, Kolkata, India. In the very first case the embryo was frozen and stored for a period of 53 days and then it was thawed out prior to it being readied for it to be implanted into a woman's womb in 1978. The same embryo led to a live birth in 1978 after a long, complete gestation period.