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duration

proestrus - less than a day

oestrus - 5-7 days

dioestrus- 40-45

clinical signs

proestrus - vulvar swelling, rubbing vocalisation

oestrus - vocalisation, rubbing on objects, elevating hindquarters

dioestrus - no oestrous behaviour

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Duration stage:

Proestrus = 5-20 days

Estrus = 5-15 days

Metestrust = 50-80 days

Anestrus = 80-240 days

Physical signs to expect:

Proestrus = Bloody discharge, swollen Vulva

Estrus = Straw coloured discharge

Which hormones are released:

proestrus is marked by high estrogen,

estrus begins with a surge in luteinizing hormone (LH) and rising progesterone,

Diestrus has high progesterone,

The cycle is completed by anestrus, where estrogen and progesterone levels are low,