text_1: Am I being too cautious in ordering a serum pregnancy test which I feel is more reliable than urine pregnancy screen?  I've never found a source that says exactly when urine screens are reliable; that is, 7 days or 10 days, et cetera.  I have found a range only.
text_2: Can I use low molecular weight heparin in pregnancy (patient with deep vein thrombosis last pregnancy)?