
Embryonic Death.
The elongated amniotic vesicle is empty. It is not unusual for the extra embryonic membranes to continue to expand before abortion occurs. Note the large, bisected corpus luteum.
Vale WG (2007)

Impending Abortion.
Decomposing fetal parts are visible within the membranes. Caruncles are in the process of regressing.
Vale WG (2007)