Why do we refuse to do Day 3 embryo transfers in our clinic
Understanding Embryo Transfer Timing in IVF
In the realm of in-vitro fertilization (IVF), the timing of embryo transfer is crucial. Many clinics opt for Day 3 transfers, particularly when only a few eggs are retrieved, fearing that a longer in vitro culture might lead to embryo arrest in the lab. This choice is driven by a concern that if embryos do not survive to Day 5, there would be nothing to transfer, which could lead to dissatisfaction, and the patient would then blame the clinic for incompetence.
The Benefits of Day 5 (Blastocyst) Transfers:
At our clinic, we advocate for Day 5 transfers, also known as blastocyst transfers, based on their distinct advantages. Transferring an embryo at Day 5 allows us to observe its development in vitro and ensures that it has reached a critical growth stage, indicating a higher potential for successful implantation. In case the IVF cycle fails, this practice helps distinguish whether the issue lies with the embryo's viability or with the uterine environment. By allowing embryos to develop to the blastocyst stage, we can provide patients with a more informed explanation should the cycle not result in pregnancy, rather than prematurely transferring the embryo on Day 3 and then attributing potential failure to the patient by blaming her for this . Many doctors unkindly do this by telling the patient the embryo failed to implant because she did not “rest” enough, which is a complete lie, but blaming the patient helps the doctor deflect responsibility.
Addressing the challenges faced by older women:
This approach is particularly beneficial for older women or those with poor ovarian reserve, who may produce only a few eggs. If these embryos arrest in the lab, it clearly indicates issues with egg quality, possibly guiding decisions towards using donor eggs rather than attempting further personal cycles or surrogacy. We educate our patients that an IVF cycle is not just a treatment but also an invaluable diagnostic and prognostic tool that offers crucial insights that might not be otherwise obtainable.
The Problem with Day 3 Transfers and Clinic Reputation:
The reliance on Day 3 transfers by many clinics can stem from a lack of confidence in their embryology lab. These are also usually the clinics that transfer many embryos at one time in the hope that at least one will successfully implant, a practice that suggests poor patient care. Such clinics also typically avoid sharing embryonic images with patients to keep them in the dark.