( ( In men ) ( , ( ( ( the ( senescent changes ) ) ( in ( the ( reproductive system ) ) ) ) ( ( ( ( ( ( occur gradually ) , ) and ) include ) ( ( ( ( ( ( declining ( sperm count ) ) , ) ( less ( testosterone secretion ) ) ) , ) and ) ( waning libido ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NNS men))) (, ,) (NP (NP (DT the) (JJ senescent) (NNS changes)) (PP (IN in) (NP (DT the) (JJ reproductive) (NN system)))) (VP (VBP occur) (ADVP (RB gradually)) (, ,) (CC and) (VBP include) (NP (NP (JJ declining) (NN sperm) (NN count)) (, ,) (NP (JJR less) (NN testosterone) (NN secretion)) (, ,) (CC and) (NP (VBG waning) (NN libido)))) (. .)))
In men, the senescent changes in the reproductive system occur gradually, and include declining sperm count, less testosterone secretion, and waning libido.
(ROOT (S (NP (DT The) (JJ male) (JJ reproductive) (NN system)) (VP (VBZ consists) (PP (IN of) (NP (NP (NNS structures)) (SBAR (WHNP (WDT that)) (S (VP (VBP produce) (NP (NN sperm) (CC and) (NN secrete) (NN testosterone)))))))) (. .)))