CRYOPRESERVATION
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Nowadays the most popular and up to date technology of cryopreservation is vitrification that able to cryopreserve embryo and gametes cells for future use. Vitrification is the rapid cooling of liquid medium in the absence of ice crystal formation in cell and then keep in liquid Nitrogen -195 °C, all cells will stop development and can be stored for a long time.
Embryo freezing
In those who are treated by IVF or ICSI, if can be stimulated many eggs its will have a chance to get many fertilize eggs. The embryo that is not used for transfer into the uterus in the first cycle must be preserved by freezing. When the next embryo transfer is required, the frozen embryo can be used. The advantages of embryo cryopreservation comprise of;
- Excess good quality embryos can be frozen for the next transfer without controlled ovarian hyperstimulation.
- In case there is high risk of having severe OHSS, all embryos should be frozen and transferred them later.
- Encouraging frozen – thaw embryo transfer has a higher pregnancy success rate than fresh transfer.
Egg freezing
For a woman, it’s an optional if you’re not ready for pregnancy now but want to make sure you can get pregnant later. Because if you want to have baby at an older age, there may be some problems with poor ovarian reserve, so you can preserve your eggs now for future use. For egg freezing, you’ll need to use injection medicine to stimulate your ovary to produce multiple eggs for retrieval.
You might consider egg freezing if
- You have condition that effect to fertility or you need treatment for cancer or other illness that effect your ability to pregnant.
- You prefer to reserve quality eggs for future use.
Sperm Freezing
Freezing sperm may also be used to store the sperm beforehand for in vitro fertilization for those who have problem with ejaculating or may not be able to ejaculate semen on the day of egg pick up.
