Luteal phase defect in habitual abortion: progesterone in saliva.

OBJECTIVE: To re-evaluate the occurrence of luteal phase defect (LPD) in habitual abortion and to determine the value of salivary progesterone (P) assay in its diagnosis.

DESIGN: Prospective study on patients with a history of at least three consecutive miscarriages.

SETTING: Departments I and II of Obstetrics and Gynecology, University Central Hospital of Helsinki, Helsinki, Finland.

PATIENTS: Forty-six patients (27 primary and 19 secondary aborters) and 12 healthy control women without a history of abortion.

RESULTS: Eight patients (17.4%, 5 primary and 3 secondary aborters) exhibited a delay of greater than 2 days in endometrial maturation during two consecutive cycles, whereas in 38 patients (82.6%) endometrial maturation corresponded to the actual cycle day. Salivary P showed a distinct ovulatory rise, but no statistically significant differences were evident between patients (with or without LPD) and healthy control women.

CONCLUSIONS: An endometrial maturation defect may be a factor in 17.4% of patients with habitual abortion, but this cannot be detected by salivary P assay.