i'm wondering if its possible to pay the embryologist for a consult? i know they are probably crazy busy as it is, but i think if you could pay them for even 20 minutes of their time, it would be worth it.
i wonder the same thing, ntj, about why there is difference in transfer days. could one reason for a 5 day transfer be because they want to see if the embryo arrests after pgd or continues to grow into a blast? i've read that many times there is a 3 day transfer when just doing ivf, but allowing it to grow a few more days gives a chance to weed out those embies that wouldnt be fit enough to transfer by day 5, upping the pregnancy rate.
i got on the reprogenetics website and copied this paragraph from them which states that their lab time is 6 to 12 hours after the sample, or longer if needed. using reprogenetics as an example, perhaps that explains why some clinics are able to transfer earlier than others. also remember that there is travel time for some cells too. at my clinic, the cell is taken out of house to culture. the embies stay the clinic.
i also googled the question...why do a 5 day transfer over a 3 day transfer after pgd, but i have a screaming child coming at me so i have to split. perhaps someone can add to this....
PGD of aneuploidy:
Reprogenetics tests chromosomes X, Y, 13, 15, 16, 17, 18, 21 and 22. This is based on trisomies arriving to term (XY,13,18,21), common in spontaneous abortions (16,22,15,21) and most common aneuploidies found in day 3 embryos (22,16,21,15,17) (Munné et al, Reprod Biomed Online, 2004: 8:81-90).
In addition, for those cells with questionable results, we reanalyze with telomeric probes, which bind to a different locus, and therefore may discriminate probe overlaps or split signals (Colls et al. 2004, Prenat Diagn 24:741-744), thus reducing our error rate to very low levels.
Laboratory time is 6-12 hours after sample arrival; perhaps longer if a third round of telomeric probes is needed.