Hey Melbo, still tryin to understand all this stuff sorry, so your first reading was 75, was that 14 days past transfer & how many days were the embies (eg: 5 day blasts)? Are Beta HCG BT's different between AIH & IVF? Coz I though a +'ve was >=5, and that level may not necessarily be present when AF is due, for those whom implant late. :-)