Fremitus Detection – Days of Pregnancy in Cattle

During pregnancy diagnosis in cattle by rectal palpation, the fremitus (palpation of middle uterine artery) is seen at:

Correct Answer: 80–120 days of pregnancy

Fremitus refers to the palpable vibration (buzzing or thrill) felt in the middle uterine artery due to increased blood flow to the gravid horn during pregnancy. It is detected at 80–120 days of pregnancy in cattle.

What is Fremitus?

• As the uterus enlarges and the fetus grows, blood flow through the uterine arteries greatly increases.
• This turbulent blood flow creates a palpable vibration in the middle uterine artery — called fremitus.
• It is a reliable confirmatory sign of pregnancy, especially after 80 days.

Rectal Palpation Timeline in Pregnant Cattle

• 18–21 days: Persistent C.L. on one ovary
• 35–40 days: Slippage of foetal membrane (membrane slip)
• 70–80 days: Amniotic vesicle palpable
• 80–120 days: Fremitus of middle uterine artery ✔
• 150+ days: Foetal parts palpable

Why Other Options Are Wrong

• 35–40 days → that is when membrane slip is detected.
• 70–80 days → amniotic vesicle is palpated at this stage.
• 140–160 days → foetal parts are palpable; fremitus starts earlier.