( ( ( The site ) ( of ( the ( ruptured follicle ) ) ) ) ( ( develops ( into ( ( a structure ) ( called ( ( the ( corpus luteum ) ) ( -LRB- ( CL -RRB- ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN site)) (PP (IN of) (NP (DT the) (JJ ruptured) (NN follicle)))) (VP (VBZ develops) (PP (IN into) (NP (NP (DT a) (NN structure)) (VP (VBN called) (NP (NP (DT the) (NN corpus) (NN luteum)) (PRN (-LRB- -LRB-) (NP (NNP CL)) (-RRB- -RRB-))))))) (. .)))
The site of the ruptured follicle develops into a structure called the corpus luteum (CL).
(ROOT (S (NP (NP (DT The) (NNS cells)) (PP (IN in) (NP (DT the) (NN follicle)))) (VP (VP (VBP undergo) (NP (JJ physical) (NNS changes))) (CC and) (VP (VBP produce) (SBAR (S (NP (DT a) (NN structure)) (VP (VBD called) (NP (DT a) (NN corpus) (NN luteum))))))) (. .)))