[Luteal insufficiency and endometriosis. Comparative study of plasma progesterone and of the evolutionary stage].

24 patients who had more than two years of infertility were checked by laparoscopic and hormone (plasma progesterone) tests at the 21st-23rd day of the cycle. Two comparable groups were found: Group A with no visible endometriosis, and Group B with obvious endometriosis (stage I, IIa, IIb according to Kistner's classification). There is a significant difference between the two groups as far as the levels of progesterone in the plasma are concerned, because they are lower in Group B than in Group A. On the other hand, there is no correlation to be demonstrated between the severity of the endometriosis and the low level of progesterone.