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Explain the physiological basis of why a pill containing estrogen and progesterone can prevent pregnancy.
Random Sample
A method of selecting a subset of individuals from a population in which each individual has an equal probability of being chosen.
Informed Consent
A process by which a participant is made fully aware of a study's nature, procedures, and potential impacts before participating.
Research Study
An organized inquiry or investigation conducted to gather data and information to solve a problem, test a hypothesis, or answer a question.
Experimental Group
The group in an experiment that receives the variable being tested, which contrasts with the control group that does not receive the test variable.
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