During the first transformation scene to Helen we see Richard taking a drink and his finger nails grow to a feminine length and his arm hair shrinks. A second later he placed his hands on his legs as his genitals transform from mail to female yet he has short nails again. A few moments later he has long nails again.
When Richard first grows breasts, he rips open his shirt. A bra he wears in a wide shot vanishes in the close-up of the mirror.
In several scenes we see Richard walking into a room wearing women's clothing having just transformed back from Helen. None of the clothes in any of the scenes have torn or been even slightly stretched, a seeming impossibility given the difference in size between Richard and Helen.