At About What Point in Gestation Can an Ultrasound Exam

question 40

Multiple Choice

At about what point in gestation can an ultrasound exam determine the sex of the fetus?

• A)about 4 weeks after fertilization
• B)at the end of the first trimester
• C)about 20 weeks after fertilization
• D)at the end of the second trimester

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Definitions:

Flow-Banded Obsidian

A type of obsidian characterized by the alignment of mineral grains or layers along the flow direction of the lava.

Viscous Lava

Lava that has a high silica content resulting in a thick, slow-flowing consistency.

Mount St. Helens

Mount St. Helens is an active stratovolcano located in the Cascade Range of the Pacific Northwest, famous for its catastrophic eruption on May 18, 1980.

Magma

Liquid rock found under the Earth's surface that can harden and transform into igneous rocks.