( ( Each month ) ( , ( ( during ( the ( menstrual cycle ) ) ) ( , ( ( an egg ) ( ( is ( released ( from ( one ovary ) ) ) ) . ) ) ) ) ) )
(ROOT (S (NP (DT Each) (NN month)) (, ,) (PP (IN during) (NP (DT the) (JJ menstrual) (NN cycle))) (, ,) (NP (DT an) (NN egg)) (VP (VBZ is) (VP (VBN released) (PP (IN from) (NP (CD one) (NN ovary))))) (. .)))
Each month, during the menstrual cycle , an egg is released from one ovary.
(ROOT (S (NP (NP (DT The) (NN release)) (PP (IN of) (NP (NP (DT an) (NN egg)) (PP (IN from) (NP (DT an) (NN ovary)))))) (, ,) (VP (VBZ is) (NP (NP (NN part)) (PP (IN of) (NP (DT the) (JJ menstrual) (NN cycle))))) (. .)))