Ultrasound Basics and Pregnancy Detection (ANSC 134 - Lecture 4)

Fill-in-the-blank flashcards covering ultrasound basics and pregnancy detection in sheep, goats, cattle, and pigs.

An ultrasound machine uses a __ that emits and receives high-frequency sound waves to create an image.

transducer

The echoes returned to the transducer are captured by the computer to create an _.

image

Ultrasound machines come in sizes from very large to small; prices range from _ to _.

$600 to $33,000

Probes are very expensive, costing roughly _ to _.

$300 to $10,000

The more dense a tissue is, the more echoes bounce back; bones appear white because they are highly _.

echogenic

Muscle appears gray on ultrasound because it returns fewer echoes; it is described as _.

hypoechoic

Fluid appears on ultrasound because it provides no echoes (anechoic).

black

Sheep and goats can be detected as pregnant as early as days post-mating via transabdominal ultrasound.

40

Pigs can be detected as pregnant as early as days post-mating via transabdominal ultrasound.

24

Cattle can be detected as pregnant as early as days post-mating via rectal ultrasound.

30

A placentome is the site where the placenta attaches the mom’s side to the fetal side; the mom’s side is the and the fetal side is the .

caruncle, cotyledon

If you see this donut-shaped tissue on ultrasound, the animal is .

pregnant

Transabdominal ultrasound is a (non-invasive) method for pregnancy detection in sheep and goats.

non-invasive

Looking for a sac of fluid with a tiny inside during cattle ultrasound around 30 days post-breeding.

fetus

In mid-late gestation, rectal palpation may reveal a (balloon) indicating pregnancy.

balloon

Palpation is the process of feeling an object in the body to determine its .

size

Gestation length in pigs is days (3 months, 3 weeks, 3 days).

115

Ultrasound can help with management decisions including nutrition, culling, and strategies.

breeding