Definition: TET
Tubal Embryo Transfer
(TET): The transfer of embryos to the fallopian tubes for purposes of achieving
a pregnancy. Embryos may be transferred at the fertilized oocyte (zygote) stage
in a ZIFT (Zygote Intrafallopian Transfer) procedure or 24 hours later at the
2- to 6- cell stage in a TET procedure.
TET's are mainly used for
patients who have a difficult transcervical intrauterine transfer and/or patients
who have failed previous IVF and FET cycles due to poor embryo quality. The
theoretical advantage of a ZIFT or TET procedure over GIFT or IVF is that fertilization
is known to occur, however, embryo development can take place in the natural
tubal environment with no possibility of trauma to the endometrial lining caused
by a difficult embryo transfer. TET has the advantage over ZIFT of allowing
selection of the best quality embryos while giving patients additional time
for recovery from the egg aspiration. The majority of TET procedures are performed
on male-factor patients with difficult transcervical intrauterine transfers.
This definition is from
fertile.com
IVF
