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A 26-year-old female asked:

My period has been delayed for 4days now and it's happened like this before. i'm not married so please what could be the cause and what do i do?thanks

1 doctor answer1 doctor weighed in
Dr. Alvin Lin
Geriatrics 31 years experience
Marriage vs menses: Just because someone isn't married doesn't mean that her menstrual cycle will be regular. Many women have irregular menses. However, unprotected sexual relations can lead to pregnancy which can then delay one's periods for upwards of 9 months! if you don't want to have children now and need a regular cycle, ask about oral contraception or birth control pills. However, these won't prevent infection.
Dr. Alvin Lin
Dr. Alvin Lin commented
Geriatrics 31 years experience
Provided original answer
Irregular menses is very common in young women. Check out http://en.wikipedia.org/wiki/Anovulatory_cycle for info re anovulatory cycle as cause of irregular menses. Hormonal birth control pills can be used to regular menses but they don't prevent sexually transmitted diseases. You'll need to make your partners wear condoms each & every time to lower infection risk
Apr 12, 2014

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