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Did you outrule bacterial contamination, as that has caused us problems in the past. Also would quantifying the hCG in various dilutions suggest an interfering substance. ____________________________________________________________ Dr. Helen Grimes, Dept. of Clinical Biochemistry, UCH, Galway, Ireland -----Original Message----- From: Sharpe, Peter Dr [mailto:[log in to unmask]] Sent: 30 September 2004 16:39 To: [log in to unmask] Subject: ?? pregnancy Dear All, We have a 19 yr old girl 10 weeks since last period. Urine pregnancy test positive x 2. Serum HCG (Roche E170) < 0.6 U/l (rechecked twice and also in 1:5 dilution). Repeat urine pregnancy test in lab today (using different kit from ward tests) strongly positive. Scan shows no fetal sac but thickened endometrium. Any thoughts as to what is going on? I feel the serum HCG is correct and in keeping with scan. What could be interfering with urine test?? Best wishes Peter Sharpe ------ACB discussion List Information-------- This is an open discussion list for the academic and clinical community working in clinical biochemistry. Please note, archived messages are public and can be viewed via the internet. Views expressed are those of the individual and they are responsible for all message content. ACB Web Site http://www.acb.org.uk List Archives http://www.jiscmail.ac.uk/lists/ACB-CLIN-CHEM-GEN.html List Instructions (How to leave etc.) http://www.jiscmail.ac.uk/ The information contained in this email and in any attachments is confidential and is designated solely for the attention and use of the intended recipient(s). If you are not the intended recipient of this email, you should not use, disclose, copy, distribute or retain this message or any part of it. If you have received this in error, please notify me immediately and delete all copies of this email from your computer system(s). This email has been processed by an automated anti-virus system; however it is the responsibility of the recipient to ensure that the message (and attachments) is safe and authorized for use in their own environment. ------ACB discussion List Information-------- This is an open discussion list for the academic and clinical community working in clinical biochemistry. Please note, archived messages are public and can be viewed via the internet. Views expressed are those of the individual and they are responsible for all message content. ACB Web Site http://www.acb.org.uk List Archives http://www.jiscmail.ac.uk/lists/ACB-CLIN-CHEM-GEN.html List Instructions (How to leave etc.) http://www.jiscmail.ac.uk/