A pregnant mother reports that October 16th was the first day of her last menstrual period. What is her baby's due date?

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Prepare for the Neonatal/Pediatric Specialist Test. Use flashcards and multiple-choice questions with hints and explanations. Ready yourself for the exam!

Multiple Choice

A pregnant mother reports that October 16th was the first day of her last menstrual period. What is her baby's due date?

Explanation:
Estimating the due date uses Naegele's rule, which calculates the expected date from the first day of the last menstrual period. Take the LMP, add 1 year, subtract 3 months, and add 7 days. With an LMP of October 16, that becomes October 16 of the next year, then July 16, and finally July 23. So the due date is July 23. Another common way to think of it is 40 weeks (280 days) from the LMP, which also lands on July 23.

Estimating the due date uses Naegele's rule, which calculates the expected date from the first day of the last menstrual period. Take the LMP, add 1 year, subtract 3 months, and add 7 days. With an LMP of October 16, that becomes October 16 of the next year, then July 16, and finally July 23. So the due date is July 23. Another common way to think of it is 40 weeks (280 days) from the LMP, which also lands on July 23.

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