If 50mg of clomid (clomiphene) corrected luteal phase defect, what could have caused the luteal phase defect in the first place?

LPD: No one completely understands lpd, and its role is very much less important than believed 20 years ago. A theory is inadequate luteal phase comes from abnormal or 'weak' ovulation: thus, if Clomid (clomiphene) improves ovulation it 'might' fix lpd too. The importance of lpd is usually in pregnancy loss, and Progesterone supplementation not Clomid (clomiphene) is the main treatment.