Question : What is freezing of embryo ?
Answer : Before 2007, freezing of embryos was done with slow freezing, where embryos are put in the media and subjected to progressively decreasing temperatures sequentially. However, it didn’t yield more than 20% success rate. Besides, freezing was time-consuming and there was the unavailability of dedicated in-house embryologists. Since 2008, Vitrification, a new technique for freezing, was well accepted. Vitrification ensured minimal damage to the embryos because of lack of ice-crystal formation. Moreover, the embryos had a far higher recovery rate and survival rate after Vitrification, resulting in higher pregnancy-rate.
Question : Why does freezing give more results and what is the need for freezing?
Answer : If Vitrification department of any IVF center isn’t up to the mark, it’s impossible to give more than 30-35% results among three fresh cycle attempts. When the hormonal stimulation is done in women for Ovum pick-up, multiple follicles release the high amount of estrogen, decreasing the chances of success. A good freezing protocol is must in any IVF clinic. At WINGS, we recommend freeze-all embryos to almost 85% of our patients.
Question : What is the success rate In Freeze-Thaw embryo transfers?
Answer : The tentative success rate is 55%, always more than fresh embryo transfers. Success rates will be around 95% we have enough embryo to transfer thrice, Apart from the reduces cost of treatment, there’s no agony of multiple hormonal stimulations and needle pricks.
Question : What are the tangible benefits of frozen embryo transfer?
Answer : There are less chances of chemical pregnancy and ectopic pregnancy, apart from reduced costs and less mental agony. Such patients have babies with higher birth weight and lower prematurity.