3DT or 5DT?? Which do you feel is better?

Amyou06 · January 2013

So it sounds like my clinic prefers doing 3DT, which is ok I guess. I feel like most things I've read point to 5DT having higher success rates in pregnancy/live birth rates...I guess my thought process is that the longer we can see it's growing the likely hood that it's a strong one! But I dunno, what do you guys think/prefer? Or what have you done?

twistsandturnsto2 · January 2013

My clinic prefers 3dt unless you have a lot of eggs/embies. And I'm pretty sure that they freeze on day 3 as well. I think there are pros and cons to both transfer dates and I just went with my clinics recommendation.

BootsOrHearts · January 2013

It depends on your situation and how many embryos you end up with. It usually ends up being a game-day decision you make with your RE.

noelcallum · January 2013

Mine prefers a 5DT if possible but it depends on the number of follicles I think.

When I went to the IVF info night at my clinic, I seem to remember them saying that days 3-5 are when the sperm starts playing a role in embryo development so that is why eggs that are looking good on day 3 might arrest between 3-5 and is often a result of sperm issues.

Basically their argument was, by day 5 you know that the sperm are good too because they have had a couple of days to develop the embryo.

I wish I could find some research on that online in case I am totally remembering it wrong.

new+tothis · January 2013

noelcallum:
Mine prefers a 5DT if possible but it depends on the number of follicles I think.
When I went to the IVF info night at my clinic, I seem to remember them saying that days 3-5 are when the sperm starts playing a role in embryo development so that is why eggs that are looking good on day 3 might arrest between 3-5 and is often a result of sperm issues.
Basically their argument was, by day 5 you know that the sperm are good too because they have had a couple of days to develop the embryo.
I wish I could find some research on that online in case I am totally remembering it wrong.

This is what I was thinking too. My clinic does 3DT when egg quality is an issue or when there aren't many embies. They do 5DT for women who have MFI or a nice big selection of embies. They have an idea when you start IVF whether you'll be a 3 or 5 DT, they get more info at ER, and they make the decision the morning of day 3. I'll be getting a call tomorrow either telling me to come in ASAP or wait till Saturday.

sunflowers4AC · January 2013

I don't know if my RE has a preference. For our first IVF we did a 3dt because we only had 3 viable embryos on day 2 and then only 2 on the day of transfer. I guess his theory is to put them in their natural environment because they stand a better chance. For this IVF we had enough still viable on day 3 that they pushed us to a 5dt.

SCRN · January 2013

If your clinic prefers doing 3DT, then I would go with that. That means they have more success growing embryos to day 3 rather than waiting till day 5. Just as it was already mentioned there are pros and cons to both. But you do not want to push for a 5DT if the lab is not comfortable with that. Don't worry, there is nothing wrong with a 3DT. If you were to ask on PAIF or SAIF you will see that both 3DTs and 5DTs can be successful! Try to trust your Dr, I know it's hard

solisilou · January 2013

I feel like I'm having a flashback :-)

The only thing that helped me in this choice was to follow my heart. I had a 5dt planned for friday but it was my very last embie and I just didn't feel comfortable with that. I called them and had the ET done today (3dt). There are pros and cons for both of them and there is no scientific study revealing the ultimate truth. Just choose the path of least regret.

Btw, thank you to all the ladies that gave me support when I was facing the same dilemma

MrsChopp · January 2013

We were told that we will be doing a 5DT, but we are MFI so that could be why.

10-4LilBuddy · January 2013

My RE wants to see how many eggs fertilize and the quality of the embies before deciding. If we have just a few, she'll do a 3 dt. If more, we can be more selective and let them grown a little while longer before transferring. We are doing ICSI with IVF, so we have already been identified with mild MFI.

J&D2007 · January 2013

Mine definitely prefers a 5dt. Both Ivfs, I have had 3 or 4 embies only and she pushed to 5dt each time.

Gr8te · January 2013

I would ask how successful the lab is at growing to blast. A lot of human mistakes can happen after day 3. Also, if you have a lot of embies, growing to blast isn't as risky. Some REs believe embies that wouldn't make it to blast can turn into healthy pregnancies. With that being said, I had 15 perfect embies on day 3 with no fragmentation and only 4 made it to blast. I can't image if I would have frozen 11 bad embies that looked perfect.

Gr8te · January 2013

noelcallum:
Mine prefers a 5DT if possible but it depends on the number of follicles I think.
When I went to the IVF info night at my clinic, I seem to remember them saying that days 3-5 are when the sperm starts playing a role in embryo development so that is why eggs that are looking good on day 3 might arrest between 3-5 and is often a result of sperm issues.
Basically their argument was, by day 5 you know that the sperm are good too because they have had a couple of days to develop the embryo.
I wish I could find some research on that online in case I am totally remembering it wrong.

PP is right. Sperm is activated after day 3.

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