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blostocyst freezing


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#1 tired

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Posted 21 May 2010 - 09:10 PM

I keep reading that 5 day embryo's don't freeze as well as 3 day. Is this true, and if yes, why is that. I have 3 frozen blasts as well as 2 hopefully implanting in me as we speak.

#2 Lilygirl2727

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Posted 22 May 2010 - 12:22 AM

I keep reading that 5 day embryo's don't freeze as well as 3 day. Is this true, and if yes, why is that. I have 3 frozen blasts as well as 2 hopefully implanting in me as we speak.


I have never heard that...in fact my RE only freezes blasts. For instance, I had about 13 eggs left over after my last fresh cycle and my RE only froze 6 of them that were high quality blasts. Best of luck to you.


My age: 38
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We have 2 children and are also raising my 7 year old nephew.

6 previous ectopics before moving to IVF

IVF #1: BFN
FET#1: BFN
FET#2: BFN
FET#3: BFN
IVF#2 Novermber 2005: BFP..... DD Ily Scarlet born 7-23-06
FET#4 July 2007: BFN
IVF#3 Jan 2008: BFP.....DS Cooper Lawson born 10-2-08
FET#5: May 2009: BFP......chemical pregnancy
IVF#4 September 2009: BFP.......identical twins m/c at 12w3d


Anxiously awaiting the start of my first normal period after miscarriage......

1/9/10 AF finally arrived! Hysterosonogram and mock transfer next week.
FET#6 next month
1-28-10 Hysterosonogram normal...waiting to start AF to begin FET cycle

Decided to postpone cycle due to too much stress in my life.

March 7, 2010 AF arrived.....Estrace begins. Transfer on March 26th!


3/26/10 3 beautiful expanding frozen blasts transferred
3/29/10 BFP on a First Response Early Result
3/31/10 HPT's getting darker!

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4/12/10 Beta back: 15700 @ 17dp5dt....u/s on April 19th..hoping to find at least one healthy baby!
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7/02/10 It's a Boy and a Girl! Uterus measuring 4 weeks ahead
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10/08/10 30w5d...babies both weigh 3 1/2 pounds....cervix soft and short a 1.6, but closed. On strict bedrest til babies come!
10/21/10 32w4d...Cervix down to 1 cm and 1 cm dilated. On Procardia to keep contrax away and remaining on bedrest.
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#3 Riley22

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Posted 28 May 2010 - 03:17 PM

That is an interesting question. I would also like to know the answer to that question. I have Blasts fozen & (2) 3 day embryos. I do know that when I had my FET done it was frozen at a perfect 4aa & once thawed it was a 3aa. Look forward to the response.
ME- 35 DH-35
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October / November 09- Cancelled IVF just before retreival due to high progesterone
Jan / Feb 2010 IVF/ICSI -9 fertilized -transfered one perfect blast
- BFN
March / April 2010 Natural FET - Transfered one blast- BFN

April 2010 Endo Biopsy done - No issues found
June 2010 Natural FET (2) 3 day Embryos BFN
September 2010 Natural FET- 2 Blasts - BFP!
Beta 64 @ 7dp5dt
Second Beta 9dp5dt 210
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#4 Brionna

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Posted 01 June 2010 - 02:54 PM

The way I understood it, was that the more cells there were to the embryo (which is the case with the blasts vs 3 days) the more fragile they are and less likely to survive the freezing/unfreezing process.

#5 kerrilyn

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Posted 01 June 2010 - 02:59 PM

I actually heard the opposite... that blasts are stronger and survive the thaw better... interesting that we've all heard different things...
Me (Kerri-Lyn) 41, DH (Steve) 37, TTC since April 2007Unexplained IF (possibly crappy eggs, AMH 10.4 = poor responder) - HSG, SHGx3, Lap, Cycle Monitoring, Recurrent loss bloods, EMB, Karyotyping, DNA Frag - all normal! 7 IUI's, 2 cancelled IVF's, 3 complete IVF's, 1 FET, 2 clinics, 1 early miscarriage, lots of debt, lots of heartache, lots of tears. We rolled the dice and got lucky on our last ditch "close the door" cycle and have a beautiful little girl. April 2014 - Had the crazy notion to try for another. Shocked with a BFP, miscarried @ 8W6D. See my "about me" page for more cycle details.