As per the data plotted in the graph, in which period of the menstrual cycle is the chance of fertilization very high in human female?

According to the given graph ovulation is occurring on 14th day. The chances of fertilisation is highest around the ovulatory phase. Fertilisation can only occur if the ovum and sperms are transported simultaneously to the ampullary region. Coitus from day 10 to 17 of the menstrual cycle when ovulation could be expected will lead to conception. It is know as the fertile period.