The LH surge causes the initiation of the process of ovulation. After ovulation, the follicle is transformed into the corpus luteum, which is stimulated by LH. It occurs roughly 36 hours before ovulation which indicates egg has matured and is ready for fertilisation. Hence, The LH surge is essentially a signal sent from the brain to the ovary, which indicates An egg is mature.So, the correct answer is 'An egg is mature'.