( ( Comparison ( of ( ( the results ) ( from ( ( ( ( a ( trial study ) ) ( in ( non-pregnant animals ) ) ) and ) ( ( a ( main study ) ) ( in ( pregnant animals ) ) ) ) ) ) ) ) ( ( should ( establish ( whether ( ( the ( test substance ) ) ( ( is ( ( ( more or ) less ) ( toxic ( in ( pregnant animals ) ) ) ) ) ( than ( in ( non-pregnant animals ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Comparison)) (PP (IN of) (NP (NP (DT the) (NNS results)) (PP (IN from) (NP (NP (NP (DT a) (NN trial) (NN study)) (PP (IN in) (NP (JJ non-pregnant) (NNS animals)))) (CC and) (NP (NP (DT a) (JJ main) (NN study)) (PP (IN in) (NP (JJ pregnant) (NNS animals))))))))) (VP (MD should) (VP (VB establish) (SBAR (IN whether) (S (NP (DT the) (NN test) (NN substance)) (VP (VBZ is) (ADJP (ADVP (RBR more) (CC or) (RBR less)) (JJ toxic) (PP (IN in) (NP (JJ pregnant) (NNS animals)))) (PP (IN than) (PP (IN in) (NP (JJ non-pregnant) (NNS animals))))))))) (. .)))
Comparison of the results from a trial study in non-pregnant animals and a main study in pregnant animals should establish whether the test substance is more or less toxic in pregnant animals than in non-pregnant animals.
(ROOT (S (NP (DT A) (JJ pregnant) (NN woman)) (VP (MD should) (VP (VB avoid) (NP (JJ toxic) (NNS substances)) (SBAR (IN while) (FRAG (ADJP (JJ pregnant)))))) (. .)))