I wish this were Math and I could just say “Always transfer only ONE Blastocyst”
Truth is 95% of the times we follow the rule of single Blastocyst transfer, but the 5% variation to the rule is what makes Embryology interesting. However, as a rule, we NEVER transfer more than 2 embryo’s to the patient.
Everything about Assisted Reproductive Technology has emerged over the last decade to give better results. From better Stimulation Protocols, to better drugs, better media and better equipment. All the advancements we see in ART today are aimed to give us an increase in take home baby rate.
Few years back, in absence of newer and tested protocols and techniques, it was a norm to transfer 3 Day 3 Embryo’s. However, due to availability of better culture media and environment, most of the standard IVF Labs culture the embryo upto Blastocyst (Day 5 embryo) and offer a single Blastocyst transfer to patients.