The question "Which born is the longest?" is ambiguous. It could be asking about:
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The longest period of time between births: In this case, the answer would be the time between the births of two embryos frozen for nearly 25 years. One of these embryos was born in 2017, setting the record for the longest time between an embryo being frozen and being born.
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The longest bone in the human body: In this case, the answer would be the femur, commonly known as the thigh bone. It is one of the most researched bones in human anatomy and forensic medicine.
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The longest period of time a person was awake with their newborn: This is a subjective question, as the "longest" period will vary depending on individual circumstances. However, a Reddit discussion on this topic suggests that some parents have experienced as long as 9 hours awake in the first week after birth.
