Has anyone here heard of the Hook Effect? Women feel they are pregnant but get persistant negative home pregancy test results (and theyre not testing too early), only to find out later (sometimes in the 2nd or 3rd trimester) that they are truly pregnant. Their hCG levels were too high to show up on standard HPTs and can only be detected with an ultrasound or in some cases a blood test. In many cases these women experienced a pregnancy with twins or more.
Ive heard of several people (whom I know personally, not on internet forums) who had negative HPTs but in a doctors blood test were positive and resulted in having a healthy child several months later.
Im beginning to not trust HPTs.