( ( ( Vaginal changes ) ( Estrogen loss ) ) ( ( ( will also ) ( cause ( vaginal changes ) ) ) . ) )
(ROOT (S (NP (NP (JJ Vaginal) (NNS changes)) (NP (JJ Estrogen) (NN loss))) (VP (MD will) (ADVP (RB also)) (VP (VB cause) (NP (JJ vaginal) (NNS changes)))) (. .)))
Vaginal changes Estrogen loss will  also cause vaginal changes.
(ROOT (S (NP (NNP Estrogen)) (VP (VBZ causes) (NP (NP (DT the) (NNS changes)) (PP (IN of) (NP (NN puberty))))) (. .)))