Why you shouldn't agree to a Day 3 embryo transfer by your IVF doctor?

Many IVF clinics take a lot of shortcuts when treating their patients. One of the commonest is transferring Day 3 embryos instead of Day 5 embryos. The logic they use is completely flawed. They claim that if an embryo is going to become a baby, it will become a baby whether we put it back on Day 3 or Day 5, so why bother to grow it for an additional 2 days in the lab? They also justify this by saying the uterus is a better incubator than an IVF lab incubator.

However, the reality is that they don't have any confidence in their own IVF laboratory, and are not sure that their laboratory will be able to grow embryos from Day 3 to Day 5, which is why they are in a hurry to put the embryos back in the uterus on Day 3, even though they know that this is not the right thing to do. They do this because if the embryo doesn't implant, then they can "diagnose " this as failed embryo implantation, and tell the patient that the reason the embryo did not implant is that there was something wrong with your eggs or your sperm, so they can earn even more money by advising the patient to use donor eggs or donor sperm or even surrogacy, by blaming the patient for the failed implantation, rather than accepting the fact that the reason the embryo did not implant is that the lab was not good quality enough to be able to grow it to Day 5.

Day 3 embryos belong either in the fallopian tube or in the test tube they do not belong in the uterus! In the human body, the embryo reaches the uterus only on Day 5, and putting the embryo back in the uterus before this day just compromises your chances of success.

However, many doctors continue doing this, because its easy for them to exploit the patients ignorance, gullibility, and desperation. Patients don't know any better, and they passively believe that whatever the doctor says is gospel truth. To compensate for the fact that the implantation rate of Day 3 embryos is lower than Day 5 embryos, they transfer two or more embryos, increasing your risk of multiple pregnancies, and wasting your embryos as well.

I understand the fear that if the doctor tries to grow the embryos in the incubator and they arrest ( stop growing) in the lab on Day 4, they will not have any embryos to transfer back, and their whole cycle will get wasted. The fact of the matter is that if an embryo is going to become a baby, it has to grow from Day 3 to Day 5, whether it does this in the uterus, or in the incubator. Now, if an embryo is going to arrest in an incubator in a good IVF laboratory, this means that it would have been arrested in the uterus as well, and that embryo would never have implanted and become a baby. However, by putting it back too early, you lose valuable information, and the doctor can get away by blaming you for the failure, rather than accepting the responsibility that the lab was not good enough.

If the doctor doesn't have enough confidence in his IVF lab and doesn't feel that it will be able to grow embryos routinely to Day 5, then why are you taking treatment in that clinic in the first place? The first thing you should do is find a better doctor, who routinely grows embryos to Day 5 for all patients, transfers only single blastocysts, and provides photos proactively to all his patients