My wife has 28 or 29 days cycle. The next cycle may start on 23rd or 24th jan. We have been preparing to get pregnant during next cycle / ovulation that may happen on 5th or 6th feb. But turns out, we have to attend very important event on these dates - hence missing the window. Is there any way we can delay the period so we can come back on 7th evening and be able to conceive after that date? Delaying period for 5 to 7 days without having any harm to potential fetus?