Prolonged Gestation: Overdue Mares

Prolonged Gestation: Overdue Mares

by Robert N. Oglesby DVM

Introduction

Introduction » Prolonged Gestation not Uncommon » Possible Causes » Induction? » More Info & Discussions

This report consists of information and forum discussions on prolonged gestation in mares. Also discussed are possible causes, indications for induction, and links to related topics.

Prolonged Gestation not Uncommon

Introduction » Prolonged Gestation not Uncommon » Possible Causes » Induction? » More Info & Discussions

The wide range of the length of normal gestation in mares requires that the diagnosis of prolonged gestation be made only after the pregnancy persists after 350 days of gestation. Normal births have occurred up to 13 months post breeding. At 350 days it makes sense to ultrasound the foal and check for abnormalities. It is unusually for late foals to be unusually large. Induction should not be considered just because of a prolonged gestation until after 365 days of pregnancy and then should be carefully considered.

Possible Causes

Introduction » Prolonged Gestation not Uncommon » Possible Causes » Induction? » More Info & Discussions

                       
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