( ( During the ) ( ( ( ( fetal ( period ( -LRB- ( ( ( ninth week ) ( to birth ) ) -RRB- ) ) ) ) ... ) . ) '' ) )
(ROOT (S (NP (RB During) (DT the)) (VP (VBZ fetal) (NP (NP (NN period)) (PRN (-LRB- -LRB-) (NP (NP (JJ ninth) (NN week)) (PP (TO to) (NP (NN birth)))) (-RRB- -RRB-)))) (: ...) (. .) ('' '')))
During the fetal period (ninth week to birth) ... ."
(ROOT (S (NP (DT The) (JJ fetal) (NN period)) (VP (VBZ lasts) (NP (NP (QP (RB approximately) (CD 30)) (NNS weeks)) (NP (NNS weeks)))) (. .)))