Answer :
Final answer:
There are over 4 million live births in the U.S. each year, with test-tube fertilization and artificial insemination being nonnatural methods of conception used to help couples conceive.
Explanation:
Overview of Live Births in the United States
Each year, there are over 4 million live births in the United States. This statistic reflects trends in healthcare, population growth, and reproductive health, illustrating how the birth rate can impact society. Understanding the factors that contribute to these numbers, such as socioeconomic status and access to healthcare, is crucial for studying public health.
Test-Tube Fertilization and Artificial Insemination
Both test-tube fertilization and artificial insemination are considered nonnatural methods of conception. They are utilized when couples encounter difficulties in achieving pregnancy through natural means. These methods are not exclusive to any specific geographic area; they are applied globally across various cultures to assist individuals seeking to conceive.
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