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→Normal structures found during pregnancy
====Normal structures found during pregnancy====
====Normal structures found during pregnancy====
#Corpora lutea in ovaries.
#Corpora lutea in ovaries.
#Endometrial cups in the mare. These develop from foetal tissue, visible from day 40, pale and start to slough from day 100. They produce gonadotrophic hormones.
#Endometrial cups in the mare. These develop from foetal tissue, visible from day 40, pale and start to slough from day 100. They produce gonadotrophic hormones. The cups vary from 1-10cm and hold a mixture of debris and secretion which is honey-like. They are not usually found in the placenta at term as they should have disappeared by day 130. The debris from the sloughing of the cup may form allantochorionic pouches, up to 2cm in length, which can be present in the placenta at term.
#Amniotic plaques consisting of 2-4 mm plaques of squamous epithelium.
#Amniotic plaques consisting of 2-4 mm plaques of squamous epithelium.
#Placental mineralisation, a milky deposition of calcium mid-pregnancy. May get small bony plaques in the allantochorion.
#Placental mineralisation, a milky deposition of calcium mid-pregnancy. May get small bony plaques in the allantochorion.