It is true that Vasoline can cause the condom to weaken. If the condom did not leak or break, the chances of pregnancy is less likely. Condoms, when used appropriately, have a contraception rate above 98% - this will decrease if the condom has been damaged in some way. Obtaining a pregnancy test is the only way to know for sure.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
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