( ( ( Palatal development ) ( in ( the fetus ) ) ) ( ( begins ( at ( ( ( about six ) weeks ) ( in utero ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Palatal) (NN development)) (PP (IN in) (NP (DT the) (NN fetus)))) (VP (VBZ begins) (PP (IN at) (NP (NP (QP (RB about) (CD six)) (NNS weeks)) (PP (IN in) (NP (NN utero)))))) (. .)))
Palatal development in the fetus begins at about six weeks in utero.
(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.