Some types of cancer such as bladder and ovarian cancer can create small amounts of hCG, which can cause a false positive to occur on a pregnancy test. Only highly sensitive tests are able to do this.
Read the full article on: When should you take a pregnancy test for it to be reliable? ( 55).
Andrea Rodrigo
B.Sc., M.Sc.
Bachelor's Degree in Biotechnology from the Polytechnic University of Valencia. Master's Degree in Biotechnology of Human Assisted Reproduction from the University of Valencia along with the Valencian Infertility Institute (IVI). Postgraduate course in Medical Genetics.