The theme of this film is closely related to Sigmund Freud's famous theory of the 'Oedipus Complex', which states that there is an unconscious wish for a son to have sex with his mother. He also described the 'Electra Complex' which was the equivalent for females. A similar theme was explored in the 1974 movie 'The Savage is Loose'.
Hannah Murray and Naralia Tena have both appeared on the critically acclaimed HBO fantasy television show Game of Thrones. Murray played a wildling daughter of Lord Craster, and Tena played the wildling Osha.
The entry at The Movie Database site for the 2015 Danish documentary, Naturens Uorden (Natural Disorder), about a guy with cerebral palsy features a poster exactly like the one for Womb, right down to the body pose and the hand gestures. This is odd because Natural Disorder is a documentary and Womb is a science fiction film and they have nothing to do with each other.