Multiple Choice QuestionThe most common infant sleep-related problem isMultiple choice question.sleep apnea.nighttime waking.insomnia.hypersomnia.

Analysis of Options

1. Sleep Apnea: This condition is characterized by interrupted breathing during sleep. It occurs less frequently compared to other sleep-related issues in infants.

2. Nighttime Waking: Many infants wake frequently during the night, especially in the first year. This is often due to feeding needs or comfort-seeking behaviors.

3. Insomnia: This refers to difficulty in falling asleep or staying asleep. While some infants may experience sleep onset difficulties, it is not the most common issue.

4. Hypersomnia: This is excessive sleepiness, which is not typically a prominent problem observed in infants.

Conclusion

The most common sleep-related problem for infants is nighttime waking.

Final Answer

Nighttime waking is the most common infant sleep-related problem.