What is the probability of ABO hemolytic disease of the newborn in the second pregnancy?

Patient's question:

I got married last year. Recently, I've been experiencing lower abdominal pain, especially during my period. I'm very worried about it affecting my fertility, and I'm also extremely sensitive to cold and coldness. Could you please tell me what the probability of ABO hemolytic disease is with a second pregnancy?

Doctor's answer:

If you have had a child with hemolytic disease, the likelihood of it happening again is almost 100%. It is recommended to monitor blood type antibodies after pregnancy and start medication for prevention at 24 weeks of gestation. During delivery, retain the umbilical cord blood for newborn hemolysis testing, and immediately transfer the newborn to the pediatric department for treatment after birth.
Generally, it is mainly roundworms. The symptoms of roundworms include abdominal pain, which can resolve on its own, but may also include pica (craving non-food items), anorexia, and bruxism (teeth grinding). If there are no obvious symptoms, you can go to the hospital for a stool examination to check for roundworm eggs. It is recommended to perform multiple tests to determine if roundworms are present.

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