The period usually starts about 12 to 16 days after ovulation , with the average being around 14 days. This phase between ovulation and the start of the next period is called the luteal phase, which typically lasts about 12-14 days but can range from 9 to 16 days depending on the individual cycle. If pregnancy does not occur, hormone levels drop, and the uterine lining sheds, leading to menstruation.

In summary:

• Ovulation occurs about mid-cycle (around day 14 in a 28-day cycle).
• The egg survives 12-24 hours post-ovulation.
• If not fertilized, the period follows after approximately 12-16 days (the luteal phase).
• This timing can vary slightly person to person but remains relatively consistent for each woman.

Thus, the period typically begins around two weeks after ovulation if pregnancy does not occur.