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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Late Periods Post Unprotected Sex?

This query is regarding my friend. She has quite regular periods. She had a sex a week before of her period date and that time her period was late by 2 days. She never had sex later on. she is waiting for her next period. Its a more than a week now it was suppose to come on 3rd of Oct. Does she s pregnant ?
posted on Tue, 14 Oct 2014
Twitter Fri, 28 Nov 2014 Answered on
Twitter Tue, 9 Dec 2014 Last reviewed on
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OBGYN 's  Response
hello,
Ovulation occur two weeks prior to the onset of the next period unless there is a luteal phase defect when it can be shorter. Thus, the period when she had intercourse was safe and the chances of conception are almost nil. In the current scenario, a HPT should be done to exclude/confirm pregnancy along with a clinical evaluation by a specialist. A trans-vaginal sonogram would be of much use to know the status of the pelvic organs. Stress, sudden weight changes, certain medications, infections and hormone imbalances can cause period disturbances. Hope this helps.
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General & Family Physician Dr. Ramesh M.Vachharajani's  Response
Hi,
As she got her period even 2 days late after sex and she had no sex afterwards and had sex during safe period, there is less risk of having pregnancy.
There might be having some other reasons like tension, stress or some hormonal disturbances.
But to be on safe side go for urine test for pregnancy to rule out pregnancy.
Ok and take care.
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What Causes Late Periods Post Unprotected Sex?

hello, Ovulation occur two weeks prior to the onset of the next period unless there is a luteal phase defect when it can be shorter. Thus, the period when she had intercourse was safe and the chances of conception are almost nil. In the current scenario, a HPT should be done to exclude/confirm pregnancy along with a clinical evaluation by a specialist. A trans-vaginal sonogram would be of much use to know the status of the pelvic organs. Stress, sudden weight changes, certain medications, infections and hormone imbalances can cause period disturbances. Hope this helps.