( ( ( Neural ( development beginnings ) ) ( quite early ) ) ( , ( therefore ( ( ( also ( ( look ( at notes ) ) ( covering ( ( ( Week 3 ) - ) ( ( ( neural tube ) and ) Week ) ) ) ) ) ( 4-early ( nervous system ) ) ) . ) ) ) )
(ROOT (SINV (S (VP (VB Neural) (NP (NN development) (NNS beginnings)) (ADVP (RB quite) (RB early)))) (, ,) (ADVP (RB therefore)) (VP (ADVP (RB also)) (VBP look) (PP (IN at) (NP (NNS notes))) (S (VP (VBG covering) (NP (NP (NNP Week) (CD 3)) (: -) (NP (NP (JJ neural) (NN tube)) (CC and) (NP (NN Week))))))) (NP (CD 4-early) (JJ nervous) (NN system)) (. .)))
Neural development beginnings quite early, therefore also look at notes covering Week 3- neural tube and Week 4-early nervous system .
(ROOT (S (NP (NP (DT The) (NN development)) (PP (IN of) (NP (NP (DT the) (JJ respiratory) (NN system)) (PP (IN in) (NP (DT the) (NN fetus)))))) (VP (VBZ begins) (PP (IN at) (NP (QP (RB about) (CD 4)) (NNS weeks)))) (. .)))
The development of the respiratory system in the fetus begins at about 4 weeks.