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Published on:

27th Jun 2022

What happens to our frozen embryos?

We’re in a conversation about what happens to our frozen embryos and the future of cryo storage with Cynthia Hudson, VP of Clinical Strategy & Specimen Services at TMRW, and Elizabeth Carr, the first IVF baby born in the United States. To give you a bit of background, Cynthia is an embryologist and medical technologist with over 20 years of experience in reproductive technology she has worked in, and founded, a number of leading IVF practices and designed multiple IVF laboratories and Natalie met with her in London to get a live demo of their technology. Elizabeth works with the company as part of their marketing team and shared her experience of life as the first  IVF baby in the US, and her decision to become work in the world of ART. 

What was discussed 


  • Explaining the TMRW system in the Cloud
  • Opportunity to have lots of backups and a cynic’s inventory is updated in a real team 
  • How the system speeds up a lab and makes an embryologist's life easier 
  • Cryo beacon - holds up to 8 cry devices - standard to what exists. It has a cap, so devices can’t full out and it has a chip on it so it can be identified hands-free. 
  • Explanation of freezing and how if the cells aren’t treated before the temperature is lowered it will damage the embryo, so the water must be removed and replaced with a cry protectant. 
  • How the freezing process has changed in the last 10-15 years. Taking the temp from 37 deg C to -1.96 in under 1 second 
  • Previously walked around with buckets made of styrofoam and never had a purpose-built tool to move tissue safely around the lab. It has a see-through lid to never lose line of sight to the specimen. 
  • How it is frozen, using iris recognition and then frozen. 
  • Know the exact location of the beacon within the system 
  • Numbers  - take the storage capability vertically. 
  • In a standard clinic, they have to be manually filled, liquid nitrogen has to be at the right temp
  • Some have over 100 dewers - has to be filled and monitored regularly. This tech does it automatically. 
  • Overwatch 24 hours to make sure they know everything going on in every system. 
  • Taking a lot of risk out of the process. 
  • Elizabeth talks about how her parents had to leave the state they were living in to travel to a different one as it was illegal in the state they lived in. 
  • Her childhood was shaped by the need for her to ‘look normal’ as the topic of IVF was so she went into journalism  - because she was fed up with people asking stupid questions and decided at 10 years old she could do a better job 
  • The conversations she has with the clinic conversation about cryo storage
  • How the volume of specimens has increased, meaning the embryologists have to do a lot of extra processes - to manage them 
  • How clinics become an accidental storage facility 
  • Patients now are so much more educated and are asking more questions 



To find out more visit TMRW 

We really want to hear your thoughts on whether you think about where your embryos are stored and if this episode has got you thinking, so please email  info@thefertilitypodcast.com

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About the Podcast

The Fertility Podcast
The Fertility Podcast|Expert interviews|Women and Men sharing #TTC stories|Wellbeing support
If you’ve found your route to parenthood hasn’t been straightforward, The Fertility Podcast is for you. From how to optimise your fertility to getting pregnant naturally, navigating IVF, understanding donor conception or surrogacy to how to prepare for a life without children. Whatever your situation, you are not alone. Created by Natalie Silverman, a former fertility patient in 2014, I then joined forces with Kate Davies, an independent fertility nurse consultant as we spoke to a range of experts and people just like you. Today in 2023, Kate is now hosting the podcast without Natalie ( who you can find hosting The F Word at Work ) here the podcast is going back to its routes to share more patient stories as we’re here to hold your hand, on your route to parenthood including how it impacts you at work.

PLEASE NOTE: The Fertility Podcast has an archive of its 300 episodes on new podcast feeds called: Getting Pregnancy Ready, Infertility Support, Male Fertility, Alternative Routes to Parenthood, and Pregnancy Loss.
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Natalie Silverman