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
 
 
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