Increase your chances of pregnancy. Tandem IVF combines the IVF treatment using your own eggs and, depending on the chosen option, allows a parallel alternative to be prepared without waiting. This can be with a donor egg (FIV IM Tandem or Tandem Advanced PGT) or a frozen embryo (FIV Tandem Embryodon). This way, if pregnancy is not achieved with your own eggs, another transfer can be performed immediately.