When Is Amniocentesis Usually Performed

question 55

Multiple Choice

When is amniocentesis usually performed?

• A) at 6-8 weeks
• B) at 9-12 weeks
• C) at 14-16 weeks
• D) at 20-23 weeks

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Definitions:

Biogeochemical Cycles

Natural pathways by which essential elements or compounds move through the biosphere, lithosphere, atmosphere, and hydrosphere.

Carbon

A chemical element with symbol C, capable of forming many compounds including carbon dioxide and organic molecules.

Atmosphere

The layer of gases surrounding a planet or celestial body, gravitationally bound to it, and essential for many life forms.

Ocean

The ocean is a vast body of saltwater that covers more than 70% of the Earth's surface, important for climate regulation, transportation, and providing a habitat for countless species.