( ( ( ( ( The ( primary oocyte ) ) , ) ( in turn ) ) , ) ( ( starts ( to ( go ( through ( ( the ( first ( cell division ) ) ) ( of ( meiosis ( -LRB- ( ( meiosis I ) -RRB- ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ primary) (NN oocyte)) (, ,) (PP (IN in) (NP (NN turn))) (, ,)) (VP (VBZ starts) (S (VP (TO to) (VP (VB go) (PP (IN through) (NP (NP (DT the) (JJ first) (NN cell) (NN division)) (PP (IN of) (NP (NP (NNS meiosis)) (PRN (-LRB- -LRB-) (VP (VBZ meiosis) (NP (PRP I))) (-RRB- -RRB-)))))))))) (. .)))
The primary oocyte, in turn, starts to  go through the first cell division of meiosis (meiosis I).
(ROOT (S (NP (NP (DT The) (NN cell)) (VP (VBG starting) (NP (NNS meiosis)))) (VP (VBZ is) (VP (VBN called) (NP (DT a) (JJ primary) (NN oocyte)))) (. .)))