Although only one embryo is needed for successful conception from IVF, transfering multiple embryos increases the chance of success from IVF treatment cycles.
Commonly between 2-4 embryo transfers are legally allowed.
Turkish law prohibits the transfer of more than 3 embryos. In exceptional cases, 4 embryos may be transferred.
The UK prohibits the transfer of more than 2 embryos to women under the age of 40, and no more than 3 embryos can be transferred if the women is 40+.
