Table 1.
The characteristics of the studied population
| Variables | Mean ± SD | Range |
|---|---|---|
| Age (Year) | 32.7 ± 5.1 | 18 - 38 |
| Parity | 4.2 ± 5.7 | 0 - 9 |
| Gestational age at progesterone assay (Weeks) | 9.7 ± 0.5 | 7 - 11 |
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