( All ( ( ( ( ( take place ) weekly ) and ) ( ( last ( from 20 ) ) ( to ( 30 ( minutes approximately ) ) ) ) ) . ) )
(ROOT (S (NP (DT All)) (VP (VP (VB take) (NP (NN place)) (ADVP (RB weekly))) (CC and) (VP (VB last) (PP (IN from) (NP (CD 20))) (PP (TO to) (NP (CD 30) (NNS minutes) (RB approximately))))) (. .)))
All take place weekly and last from 20 to 30 minutes approximately.
(ROOT (S (NP (DT The) (JJ fetal) (NN period)) (VP (VBZ lasts) (NP (NP (QP (RB approximately) (CD 30)) (NNS weeks)) (NP (NNS weeks)))) (. .)))