Lucy Gray, Katita and James backstage after her last dance at San Francisco Ballet, from the series Balancing Acts, Silver gelatin print, Unframed:16 × 20in. (40.6 × 50.8cm), Courtesy of the artist, San Francisco, California

Lucy Gray, Kristin gets back in shape with Martin and six-week-old Hannah, from the series Balancing Acts, Silver gelatin print, Unframed: 16 × 20in. (40.6 × 50.8cm), Courtesy of the artist, San Francisco, California

Lucy Gray, Sasha has been fed and is napping so Tina can work out, from the series Balancing Acts, Silver gelatin print, Unframed: 16 × 20in. (40.6 × 50.8cm), Courtesy of the artist, San Francisco, California

Lucy Gray, Katita and James backstage after a performance of Nutcracker Ballet, from the series Balancing Acts, Silver gelatin print, Unframed: 20 × 16in. (50.8 × 40.6cm), Courtesy of the artist, San Francisco, California

Lucy Gray, Kristin rehearses as Kai looks on, from the series Balancing Acts, Silver gelatin print, Unframed: 16 × 20in. (40.6 × 50.8cm), Courtesy of the artist, San Francisco, California