query: When was the first embryo transfer performed?
passage: Embryo transfer
Embryo transfer can be done at day two or day three, or later in the blastocyst stage, which was first performed in 1984.[1]
passage: History of in vitro fertilisation
The first pregnancy achieved through "in vitro" human fertilisation of a human oocyte was reported in The Lancet from the Monash University team of Carl Wood, John Leeton and Alan Trounson in 1973, although it lasted only a few days and would today be called a biochemical pregnancy. Landrum Shettles attempted to perform an IVF in 1973, but his departmental chairman interdicted the procedure at the last moment. There was also an ectopic pregnancy reported by Patrick Steptoe and Robert Edwards in 1976.