Help understanding SART data

[Anonymous]

My apologies if this is a stupid question. Our first round of IVF just failed (one failed transfer and one miscarriage) and I'm trying to get a working understanding of our chances of success ahead of our appointment with the RE.

In looking at the SART data for my clinic, it looks like for women my age (39), the chances of success for a second round (39.9%) are substantially higher than for the first round (19.3%). Is that correct or am I missing something? Or is that 39.9% the cumulative likelihood of success, as opposed to the individual rate of success for a second (or third, or fourth) round? It seems strange that later rounds are more likely to be successful than earlier ones, but if true that would be helpful to know.

https://www.sartcorsonline.com/rptCSR_PublicMultYear.aspx?ClinicPKID=2329

[Anonymous]

Scroll over the "Live births per second or later embryo transfer" when that tab is open and it will tell you the numerator and denominator.

It looks like the first transfer is just that- the numerator is the number of live births from the FIRST transfer

and the second or later is the live births for transfers 2,3,4.

These are super hard to compare. Clearly the first transfer number is going to be be higher bc they transfer the best embryo and some ppl just have one. Also looking at the sample size- the "number of thaw procedures" for the first transfer is way higher (like 4x) than all the other transfers combined). But I think the "second or later" gives you an idea of you chances overall.

[Anonymous]

The way we got individualized data was cumulative. Ex. Chance of success on first round (or maybe first transfer).was X, second round was Y. Y was greater than X because it was the chance of getting pregnant / having a live birth within two rounds (cumulative).

Tis was SGF. OP you should be able to get tailored data based on your own profile as well.