( ( A blastocyst ) ( ( is ( ( a ( ( highly differentiated ) ( , ( ( highly developed ) embryo ) ) ) ) ( that ( has ( grown ( to ( ( the point ) ( where ( it ( is ( ready ( to ( attach ( to ( ( the ( uterine wall ) ) ( -LRB- ( implantation -RRB- ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN blastocyst)) (VP (VBZ is) (NP (NP (DT a) (ADJP (RB highly) (JJ differentiated)) (, ,) (ADJP (RB highly) (JJ developed)) (NN embryo)) (SBAR (WHNP (WDT that)) (S (VP (VBZ has) (VP (VBN grown) (PP (TO to) (NP (NP (DT the) (NN point)) (SBAR (WHADVP (WRB where)) (S (NP (PRP it)) (VP (VBZ is) (ADJP (JJ ready) (S (VP (TO to) (VP (VB attach) (PP (TO to) (NP (NP (DT the) (JJ uterine) (NN wall)) (PRN (-LRB- -LRB-) (NP (NN implantation)) (-RRB- -RRB-))))))))))))))))))) (. .)))
A blastocyst is a highly differentiated, highly developed embryo that has grown to the point where it is ready to attach to the uterine wall (implantation).
(ROOT (S (PP (IN After) (NP (NN implantation))) (, ,) (NP (DT the) (NN blastocyst)) (VP (VBZ is) (VP (VBN called) (NP (DT an) (NN embryo)))) (. .)))