Task: Answer Verification
Input (English): Question: Does cannulation of a resistant internal os with the malleable outer sheath of a coaxial soft embryo transfer catheter affect in vitro fertilization-embryo transfer outcome?
Answer: Cannulation of a resistant internal os by the malleable outer sheath and blood on the transfer catheter after ET do not have an adverse effect on implantation rate or clinical pregnancy rate.
Output (English): no