(S (S (NP (BASENP (NN Research)) (VP (VBN published) (PP (IN in) (NP (BASENP (DT the) (NN journal)) (NP (NP (BASENP (DT the) (NNPS Proceedings)) (PP (IN of) (NP (BASENP (DT the) (NNP National) (NNP Academy)) (PP (IN of) (BASENP (NNPS Sciences)))))) (PRN (LRB -LRB-) (BASENP (NNP PNAS)) (RRB -RRB-))))))) (VP (VBZ suggests) (NP (BASENP (DT a) (NN link)) (PP (IN between) (NP (BASENP (JJ male) (NN sexuality)) (CC and) (NP (BASENP (NNS conditions)) (PP (IN in) (BASENP (DT the) (NN womb))))))))) (PERIOD .))