We have looked into what causes embryo mix-ups, and we have concluded that most of them are tragic mistakes that resulted from human error. In the majority of cases, IVF embryo mix-ups are entirely preventable! If you look through news stories about embryo mix-ups, you will see that a lack of double-checking the labels of the embryos at all stages of the process and especially when implanting embryos into a woman's uterus, are often behind mix-ups. If there are several patients with similar names, that is where the chance of errors with life-long consequences crops up.
For an example of this, take a look at "How likely are embryo mix-ups to happen at your fertility clinic?". Before you choose a fertility clinic, ask questions about what tracking systems are in place for embryos created with invitro fertilization, and what steps are undertaken by the clinic to prevent mix-ups from happening. Also ask them whether they have ever had an embryo mix-up, and if so in what circumstances it came about. When you decide to become a patient of a fertility clinic, also double check if there are any patients at that clinic that share similar names and if there are, ask what your clinic will do to prevent a mix-ups from taking place. Are embryos numbered? Are full names used, instead of just family names, or family names and initials?