( Blastocyst ( Embryo ( Transfer - ) ) )
(ROOT (NP (NNP Blastocyst) (NNP Embryo) (NNP Transfer) (: -)))
Blastocyst Embryo Transfer -
(ROOT (S (PP (IN After) (NP (NN implantation))) (, ,) (NP (DT the) (NN blastocyst)) (VP (VBZ is) (VP (VBN called) (NP (DT an) (NN embryo)))) (. .)))