I bought these and they taste great. A Mexican buddy of mine at school let me have one and I was hooked. The only problem I had with these is that is was the Aldama brand and not Las Sevillanas but it is still a great tasting Oblea with cajeta and I plan to buy again.
The hook effect and false BFNs. Summarised, the hook effect is when someone continuously gets negative urine and blood tests but are actually pregnant. It happens because hcg levels are too high to register and is common with mothers carrying multiples or on older woman.
The hook effect is when the levels of HCG get so high that it blocks the dye from properly binding to the test line. The result is that after a certain point your tests will actually get lighter instead of darker, even though your HCG levels are still rising. Tue Sep 11, 2012 10:22 pm.