419 results about "Delaying periods" patented technology

The length of a normal menstrual cycle is 28 days, plus/minus 7 days. That is, a period may occur 7 days before the expected date of the period or may be normally delayed for 7 days beyond the expected date. But, if the delay is more than 35 (28+7) days, then the cause of the delay needs to be investigated.