Thanks for trusting us with your health concern.
IgG test positive is not significant in pregnancy
. It suggests that at some point of time in past, you had rubella infection. This has caused the development of IgG antibodies
in your body.
At present, you are not having an infection. There is no need to worry.
You can have an anomaly scan of baby between 18-20 weeks.
The slightly lower than normal levels of CO2 is suggestive of mild acidosis
due to fluid loss most likely caused by vomiting
during pregnancy. This can be corrected by increasing your fluid intake. Also, such a minor change is not significant if your pH is within normal range.
Please feel free to discuss further. I will be glad to answer the follow up queries that you have.
Wishing you good health.
Dr. Rakhi Tayal.