Final answer:
The most likely outcome if fertilization has not occurred in approximately 14 days postovulation is that menstruation will occur.
Step-by-step explanation:
The most likely outcome if fertilization has not occurred in approximately 14 days postovulation is that menstruation will occur.
Ovulation, the release of an egg from the ovary, typically occurs around day 14 of a 28-day menstrual cycle. If fertilization does not occur within a few days after ovulation, the endometrium lining of the uterus is shed during menstruation.