<prompt> Answer this question truthfullyWhat progesterone level is suggestive of a healthy intrauterine pregnancy?  <response>: <reason> A progesterone level greater than 25 ngmL is suggestive of a healthy intrauterine pregnancy. Progesterone is a hormone that is produced by the corpus luteum in the ovary after ovulation, and it plays a critical role in preparing the uterus for implantation and supporting early pregnancy. In a healthy pregnancy, progesterone levels increase and remain elevated throughout the first trimester. A progesterone level above 25 ngmL is considered a reassuring sign of a viable pregnancy, although other factors, such as fetal heart rate and ultrasound findings, are also important in evaluating the health of the pregnancy. 