A fertility monitoring app tracks a user's cycle. In this cycle, the user's mature egg is viable for up to 111 day after ovulation. The partner's sperm cells are determined to survive inside the female reproductive tract for up to 555 days.
Ovulation is detected on day 141414 of this menstrual cycle.
Determine the range of days of this cycle during which intercourse could lead to fertilisation.
Give your answer in the form: From day A\text{A}A to day B\text{B}B
62 exam-style questions on AQA GCSE Biology 5.3 Hormonal coordination in humans, covering 5.3.1 Human endocrine system, 5.3.2 Control of blood glucose concentration, 5.3.3 Maintaining water and nitrogen balance in the body, 5.3.4 Hormones in human reproduction, 5.3.5 Contraception, 5.3.6 The use of hormones to treat infertility (HT only), and 5.3.7 Negative feedback (HT only). Each one has a worked solution and a mark scheme showing where the marks go.