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Date of last update: 10/14/2017.

Forum Name: Obstetrics

Question: longest time for positive pregnancy test result?

 jennymountain - Tue Mar 09, 2010 3:17 pm

what is the longest possible time (worst case scenario) it can take to get pregnant from unprotected sex, taking into consideration all delaying factors like morning after pill, late ovulation, academic stress, panicking about being pregnant etc.)?

circumstances: condom slipped, I realised with warm sensation after ejaculation /took morning after pill Levonelle after 40hours / unsure of last period but it was due in a few days (a week at most) at time of slipped condom / not on birth control pill /usually have 6 day regular period / now 10 days since incident and 2 negative home pregnancy tests so far.

Thank you so much for your response
 Debbie Miller, RN - Thu Apr 01, 2010 10:39 am

User avatar Hello,
You can't really be comfortable with a negative test done this soon. Most consider 2 weeks to be the time you might expect an accurate result so you were a little early. But, plan B can have a serious effect on your cycle and so periods can be messed up for a little while. As you said there are other stressors which can also play a role. Because plan B is quite effective, it is unlikely you are pregnant from this encounter, but take another test now to be sure.

Best wishes.

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