The Visual Guide to
Ovine Reproduction
Abortion: Undetermined Cause

Aborted Fetus in Membranes.
Near term fetus delivered within the placenta. The cause of fetal death was not determined. The cotyledons look fresh.
Smith MC (2006)

Early Abortion.
A small fetus is still contained in the fetal membranes. The cotyledons on the membranes appear to have regressed. The caruncles are clean and small.
Mogheiseh A (2013)