On July 25,1978,Louise Joy Brown,the World's First Successful Test-Tube Baby

question 75

Multiple Choice

On July 25,1978,Louise Joy Brown,the world's first successful test-tube baby was born.Today,nearly 1% of all births in the U.S.start in the laboratory.Babies conceived through IVF are twice as likely to be born prematurely,but do not show any increase in major birth malformations,cancer,or abnormal psychological development.What is the best explanation for the lack of birth defects in IVF babies?

• A)They are implanted while in the embryonic period
• B)They are implanted while in the fetal period
• C)They are implanted while in the preembryonic period
• D)They are grown in the laboratory until they are a full grown baby
• E)They are grown in the lab until they are a viable fetus

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