Jeg fant forresten mer nøyaktig beskrivelse av hcg-stigning;
"A single HCG value doesn’t give enough information about the health or viability of the pregnancy. Within the first 2-4 weeks after fertilization, HCG usually doubles every 48-72 hours. That usually corresponds to HCG levels below 1200 IU. From 1200-6000, the HCG usually takes 72-96 hours to double. Above 6000 IU, the hCG often takes over four days to double. So, the rate of increase in HCG levels normally varies as a pregnancy progresses. Normal HCG values vary up to 20 times between different pregnancies, however, and an HCG that does not double every two to three days does not necessarily indicate a problem with the pregnancy. Some normal pregnancies will have quite low levels of HCG, and result in perfect babies."
Altså, under 1200 dobles det omtrent hver 48-72 timer, men etter 1200 så sakker doblingen noe ned og det går 72-96 timer mellom hver dobling. Det betyr opptil 4 døgn. Du tok prøver med 4 døgns mellomrom og det var nesten dobling. Helt i tråd med dette her!
Over 6000 så dobles det enda tregere. Så man skal ikke bare se på stigning og antall timer, men også nivået og hvor langt man er på vei - i tillegg til at det er individuelle forskjeller.