( ( ( ( ( She ( ( did not ) ( know ( ( the date ) ( of ( her ( last ( menstrual period ) ) ) ) ) ) ) ) , ) and ) ( ( ( ultrasound examination ) ( at ( 17 ( weeks gestation ) ) ) ) ( ( did not ) ( show ( fetal abnormalities ) ) ) ) ) . )
(ROOT (S (S (NP (PRP She)) (VP (VBD did) (RB not) (VP (VB know) (NP (NP (DT the) (NN date)) (PP (IN of) (NP (PRP$ her) (JJ last) (JJ menstrual) (NN period))))))) (, ,) (CC and) (S (NP (NP (NN ultrasound) (NN examination)) (PP (IN at) (NP (CD 17) (NNS weeks) (NN gestation)))) (VP (VBD did) (RB not) (VP (VB show) (NP (JJ fetal) (NNS abnormalities))))) (. .)))
She did not know the date of her last menstrual period, and ultrasound examination at 17 weeks gestation did not show fetal abnormalities.
(ROOT (S (NP (DT The) (JJ fetal) (NN period)) (VP (VBZ lasts) (NP (NP (QP (RB approximately) (CD 30)) (NNS weeks)) (NP (NNS weeks)))) (. .)))