Table 1 displays the blood plasma concentration of progesterone in a healthy adult female measured at intervals throughout her 28-day menstrual cycle.
| Day interval | Mean progesterone concentration (nmol dm−3\text{nmol dm}^{-3}nmol dm−3) |
|---|---|
| Days 1–5 | 1.4 |
| Days 6–13 | 1.1 |
| Days 14–16 | 16.8 |
| Days 17–21 | 39.5 |
| Days 22–28 | 2.3 |
Using the data in Table 1, explain whether this female is likely to be pregnant.
