Coombs test was positive, and the serum haptoglobin was less than 0.6.
 patient is on her second pregnancy
(ROOT (S (S (NP (NNP Coombs) (NN test)) (VP (VBD was) (ADJP (JJ positive))) (, ,)) (CC and) (S (NP (DT the) (NN serum) (NN haptoglobin)) (VP (VBD was) (NP (QP (JJR less) (IN than) (CD 0.6))))) (. .)))
(ROOT (S (NP (NN patient)) (VP (VBZ is) (PP (IN on) (NP (PRP$ her) (JJ second) (NN pregnancy))))))
( ( ( ( ( Coombs test ) ( ( was positive ) , ) ) and ) ( ( the ( serum haptoglobin ) ) ( was ( less ( than 0.6 ) ) ) ) ) . )
( patient ( is ( on ( her ( second pregnancy ) ) ) ) )