Microbiological serology during a pregnancy (except in the investigation of a clinically apparent intercurrent microbial illness or close contact with a patient suffering from parvovirus infection or varicella during that pregnancy) including: (a) the determination of 2 of the following - rubella immune status, specific syphilis serology, carriage of Hepatitis B, Hepatitis C antibody, HIV antibody and (b) (if performed) a service described in 1 or more of items 69384, 69475, 69478 and 69481