Evidence in on treating recurrent miscarriage

A large study backs the common practice of prescribing progesterone
Reuters Health
pregnancy loss

Giving progesterone to women with bleeding early in pregnancy doesn’t prevent pregnancy loss, except among women who have had a previous miscarriage, a UK study of more 4000 women shows.

For years, progesterone preparations have been used off-label to treat a threatened miscarriage based in part on a decline in hormone levels just before a miscarriage.