Progesterone 17.31 nmol/mL is not definitively intrauterine. The level of progesterone is not directly and necessarily related to whether the pregnancy is intrauterine or ectopic. After a woman becomes pregnant, the level of progesterone in her body will continue to rise. Usually, the level of progesterone is higher in the uterus than outside the uterus, but there is no direct correlation between the level of progesterone and whether the pregnancy is intrauterine or extrauterine. However, a number of tests need to be done to determine if the pregnancy is intrauterine. This can be done through ultrasound and if it shows that the gestational sac is inside the uterine cavity, it is an intrauterine pregnancy. If during the monitoring process, it is found that the human chorionic gonadotropin level and progesterone level are persistently decreasing, ectopic pregnancy needs to be considered.