Sorry, I should have been more specific. My period is 4 days late, I took a pregnancy test this morning and it was negative. I am usually very regular in my cycle and have NEVER been this late. Sorry, not talking about ovulation.
Your luteal phase is affected by your ovulation date. If you ovulate later than normal, you will have a longer cycle than normal, causing you to think your period is "late."
I have been temping or being monitored by an RE for 18 cycles. The latest I have ever ovulated is day 17, until this month when I didn't ovulate until day 22. If I wasn't temping, I would think that my period is late, since this is the longest cycle I have ever had. You can check out my chart to see that I am actually only 13DPO.