Recurrent abortion

Etiology

Luteal phase insufficiency (insufficient progesterone)
Diabetes mellitus
Hypothyroidism
Congenital anatomic lesion, eg, septate uterus
Acquired anatomic lesion, eg, incompetent cervix, intrauterine adhesions, submucous uterine leiomyoma (fibroid)
Polycystic ovary syndrome
Antiphospholipid antibody syndrome or other hypercoagulable state
Balanced chromosomal translocation