No visible process(nice before and after effect) but in this episode the character Izana Shinatose who up til this point has been a Unisex (a certain type of human who pick a sex once they find a suitable mate) picks to become fully female. The result is growing large breasts and widening hips which leads to a pilot suit to burst open on her and a bathtub scene admiring thier size.
http://anilinkz.tv/sidonia-no-kishi-...neki-episode-7