Table 1 shows the concentration of progesterone in a female's blood at different stages during her 28-day menstrual cycle.
| Days in the menstrual cycle | Progesterone level (nmol/L) |
|---|---|
| 1–6 | 2.0 |
| 7–13 | 1.8 |
| 14–16 | 18.5 |
| 17–22 | 42.1 |
| 23–28 | 45.3 |
Explain whether this female is likely to be pregnant. Use data from Table 1 to support your answer.