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.
Recently, investigation of a number of false-negative urine POC tests among patients with late first-trimester pregnancies in our ED led to the postulation of a similar but distinct hook-like effect that can result in false-negative urine hCG testing at later stages of early pregnancy (Table 1).