Cumulative presence of minimum requirements for levels of ANC provision at Zambian health facilities. This figure illustrates the effect of combining various attributes required for optimum level (A) or adequate level (B) of service provision. Of 1299 ANC facilities, 1101 also offered delivery services, considered important for the continuum of care. Out of these, 357 employed at least 3 skilled health workers (SHW) and 156 also had services 3 or more days a week. Only 45 also offered 5 ANC functions and at least 3 screening tests and were thus categorised as optimum level of ANC provision (A). Nearly all ANC facilities opened once a week and 1142 also had 1 skilled health worker. Of these, 1032 offered at least 3 ANC functions and 653 also offered at least one screening test, thus fulfilling all minimum requirements for adequate level of ANC provision (B). Uprot= Urine protein test.