What is the reference range for blood type antibody specificity identification?

Patient's question:

Hello! What is the reference range for blood type antibody specificity identification? I am currently [Anti-A1: 512].

Doctor's answer:

Analysis of the condition: Hello, you are blood type O, and your husband is blood type A. Therefore, there may be an incompatibility between the mother and child's blood types, which could easily lead to neonatal jaundice or hemolysis. It is necessary to check the antibody titer.
Suggestions: Generally, the normal antibody titer should be below 1:64. If it exceeds 1:256, treatment is required. Typically, it is treated with modified Chen Chen Hao Decoction, but without the use of hormones. Your antibody titer is 1:512, so treatment is needed, but it has not yet reached the level requiring hormone therapy. It is recommended to use Yin Zhi Huang Granules first or consult a traditional Chinese medicine practitioner for regulation and treatment.
Doctor's inquiry:

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