Abdulla, SH; Bouchard, TP; Hormonal Predictors of Abnormal Luteal Phases in Normally Cycling Women. Front Public Health. 2018 May 24;6:144. doi: 10.3389/fpubh.2018.00144. eCollection 2018.
Conclusion
This study confirms the negative impact of a small follicle size on the quality of the luteal phase. The occurrence of normal then low luteal PDG level is confirmed as a potential sign of luteal phase abnormality.