Health Facilities AVG. No ANC Clients/month Sample size  No of Controls No of Cases
Yirgalem H/ center 133 184 147 37
Hawassa H/center 94 130 104 26
YirgalemHopital 48 66 53 13
Millennium H/center 52 72 58 14
Tulla H/center 58 81 65 16
Anamura H/center 20 28 22 6
Total 405 561 449 112
Table 1: Shows calculated sample size of pregnant women allocated to each health facility.