Kessner Index Measurement Definitions:

Adequate: Care that began within the first trimester and included an average of at least one or two additional prenatal visits per month of gestation, depending on the length of gestation.

Intermediate: Care that began during the second trimester of pregnancy with correspondingly fewer visits, or began during the first trimester but with fewer visits than would be appropriate for the length of gestation.

Inadequate: When no care was received or if care began during the third trimester. It is also inadequate if care began during the first or second trimester but less than five visits occurred, when the length of gestation was 34 weeks or more. When the length of gestation was less than 34 weeks, care is defined as inadequate when care began during the first or second trimester but a number of visits less that four occurred, that number depending on the actual weeks of gestation.

Kotelchuck Index Measurement Definitions:

Adequate Plus: Prenatal care begun by the 4th month and 110% or more of recommended prenatal visits were received.

Adequate: Prenatal care begun by the 4th month and 80% - 109% of recommended prenatal visits were received.

Intermediate: Prenatal care begun by the 4th month and 50% to 79% of recommended prenatal visits were received.

Inadequate: Prenatal care begun after the 4th month or less than 50% of recommended prenatal visits were received.