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Astrid Kirchherr, who took so many iconic photographs of the Beatles, talks about life with them in Hamburg – and about taking pictures on the streets of Liverpool. Every year, thousands of women have problems during labour; Bidisha talks to the director of a new centre aiming to make childbirth safer & less traumatic. New research which suggests having a sister makes you happier and protects you from depression. And the novel which both scandalised and excited the 1920s with its frank descriptions of relationships with both men and women is adapted for radio.