If you’re trying to get pregnant then this is the question that needs to be at the forefront of your mind. You can only get pregnant in a period of a few days around when you ovulate – when your ovaries eject an egg into the fallopian tubes to be fertilised by sperm. This ‘fertile window’ is anchored by ovulation, and defined by how long both sperm and egg can survive in the body. For most people sperm can survive for four or five days while an egg remains fertile for between twelve and twenty four hours after ovulation. This…