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A 28-year-old female asked:

Good day, my menstrual cycle is 27-29 days, today marks 8 days late. i took a hpt today and the results were "not pregnant" i use yaz contraceptives, my cycle has been regular, id get my period on the last active pill but not this time. i am 28 yrs.

1 doctor answer1 doctor weighed in
Dr. John Berryman
Obstetrics and Gynecology 55 years experience
Late period ?'s: If you were late starting a new pack of "Yaz", for example waiting after the placebo pills more than a few days, the "HPT" may be a false negative. Obtain a serum HCG test to be certain. If negative, consult your gyn physician for other testing.
Last updated Jul 15, 2020

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