( ( For ( the ( first ( 8 weeks ) ) ) ) ( , ( ( the embryo ) ( ( will ( ( develop ( ( ( almost all ) ( of ( the ( ( tissues and ) organs ) ) ) ) ( present ( in ( the adult ) ) ) ) ) ( before ( ( entering ( ( the ( fetal period ) ) ( of development ) ) ) ( during ( ( weeks 9 ) ( through 38 ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN For) (NP (DT the) (JJ first) (CD 8) (NNS weeks))) (, ,) (NP (DT the) (NN embryo)) (VP (MD will) (VP (VB develop) (NP (NP (QP (RB almost) (DT all))) (PP (IN of) (NP (DT the) (NNS tissues) (CC and) (NNS organs))) (ADJP (JJ present) (PP (IN in) (NP (DT the) (NN adult))))) (PP (IN before) (S (VP (VBG entering) (NP (NP (DT the) (JJ fetal) (NN period)) (PP (IN of) (NP (NN development)))) (PP (IN during) (NP (NP (NNS weeks) (CD 9)) (PP (IN through) (NP (CD 38)))))))))) (. .)))
For the first 8 weeks, the embryo will develop almost all of the tissues and organs present in the adult before entering the fetal period of development during weeks 9 through 38.
(ROOT (S (PP (IN By) (NP (CD 8) (NNS weeks))) (, ,) (NP (DT all) (JJ major) (NNS organs)) (VP (VBP start) (S (VP (VBG developing)))) (. .)))