( Then ( ( ( proceed ( to ( the fact ) ) ) ( that ( ( ( all ( human zygotes ) ) ( -LRB- ( ( fertilized eggs ) -RRB- ) ) ) ( begin ( as ( morphologically female ) ) ) ) ) ) . ) )
(ROOT (S (RB Then) (VP (VB proceed) (PP (TO to) (NP (DT the) (NN fact))) (SBAR (IN that) (S (NP (NP (DT all) (JJ human) (NNS zygotes)) (PRN (-LRB- -LRB-) (VP (VBN fertilized) (NP (NNS eggs))) (-RRB- -RRB-))) (VP (VB begin) (ADJP (RB as) (RB morphologically) (JJ female)))))) (. .)))
Then proceed to the fact that all human zygotes (fertilized eggs) begin as morphologically female.
(ROOT (S (NP (NP (DT The) (VBN fertilized) (NN egg)) (SBAR (WHNP (WDT that)) (S (ADVP (RB sexually)) (VP (VBG reproducing) (S (NP (NNS organisms)) (VP (VB begin) (NP (NN life)) (SBAR (IN as) (S (VP (VBZ is) (VP (VBN known) (PP (IN as) (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-))))))))))))) (VP (VBP zygote)) (. .)))