A woman at 28 weeks' gestation is asked to keep a fetal activity diary and to bring the results ...

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Rationale 1: The mother would need to come to the clinic only if there had been no fetal activity for several hours.
Rationale 2: Smoking typically stimulates the infant.
Rationale 3: After meals, an infant typically is active and moving.
Rationale 4: Lack of fetal activity for 30 minutes typically is insignificant, and means only that the infant is sleeping. If the mother truly is concerned, in 30 minutes, she could eat a complex-carbohydrate snack. This would stimulate the infant, and the mother should have fetal activity. But at present, this is an indicator the infant is sleeping.