Progesterone 19.76ng/mL is not necessarily pregnant, high progesterone can only reflect the likelihood of pregnancy side by side, definitively pregnant by HCG test. If menstruation is delayed for more than a week and progesterone 19.76ng/mL, pregnancy should be highly suspected. However, it needs to be judged by HCG (human chorionic gonadotropin) test. Although progesterone will rise after pregnancy, but progesterone rise may also be caused by other reasons, such as corpus luteum cysts, hyperemesis gravidarum and so on can also cause progesterone rise, so but progesterone alone can not determine whether the pregnancy. Elevated progesterone does not determine whether you are pregnant or not, you can take a urine or blood HCG test about 2 weeks after intercourse, if you can not accurately determine, you need to consult a medical professional.