Zona drilling: The use of chemical to dissolve the gelatinous coating of the egg leaving a hole through which the sperm can enter.
Zona Pellucida: The transparent membrane or shell surrounding the oocyte (egg).
Zygote: The cell formed as a result of fertilisation.
Zygote Intra-Fallopian Transfer (ZIFT): The transfer of zygotes (early stage embryos) to the fallopian tubes for purposes of achieving a pregnancy. Embryos are transferred at the fertilised egg (one cell embryo) stage.
Page last updated: 18 July 2012