Mary Smith is pregnant and has anti-D in her serum. Her seru…
Mary Smith is pregnant and has anti-D in her serum. Her serum was titered in her 4th and 5th months of pregnancy, using the standard doubling dilution method (i.e. 1:1, 1:2, 1:4, etc). The results are shown below. Mary’s titer at 5 months is considered significant because: Patient: Mary Smith Tube number 1 2 3 4 5 6 7 8 9 10 4th month of pregnancy 4+ 4+ 3+ 2+ 2+ 1+ – – – – 5th month of pregnancy 4+ 4+ 4+ 3+ 3+ 3+ 1+ – – –