Blue Genes by Val McDermid

Manchester private eye Kate Brannigan is dealing with the worst week of her life, juggling a compromised fraud sting, a sabotaged neo-punk band, and the sudden shock of her boyfriend’s erroneous death notice in the newspaper. But her personal problems are sidelined when her best friend Alexis reveals a massive secret: her lesbian partner, Chris, is pregnant via a highly illegal, pioneering fertility treatment. When the rogue gynecologist behind the procedure is found murdered, Alexis and Chris find themselves in the crosshairs of a ruthless killer and an intense police investigation. To protect her friends' safety and their unborn child, Kate must untangle a dark web of medical malpractice, corporate greed, and cold-blooded blackmail.