My 14dpo beta was 153 then 16dpo was 381. They were both taken at 9am so 48hrs apart. My Dr is stupid and said they like em over 1000 but she is going by weeks and is off as I no dpo cause I was charting. I ovulated on cycle day 18 and have a 31-32 day cycle. My period normally arrives exactly 12 days after ovulation. So Dr is thinks ng I'm closer to 5 weeks not 4.5 but she about 4 days behind.