What statement indicates that a 16-year-old client understands expected changes during pregnancy?

The statement indicating an understanding of expected changes during pregnancy is that feeling butterflies in the stomach may mean the baby is moving. This reflects an awareness of fetal activity, which typically becomes perceptible around 18 to 25 weeks of pregnancy. The sensation often equated with feeling the baby move can be described as 'butterflies,' showcasing the girl's understanding of her body's changing experiences as a mother-to-be.

Feeling butterflies suggests the client recognizes the development stages of the fetus and can associate physical sensations with fetal movements, which is an important aspect of the pregnancy experience. Understanding how these sensations relate to the baby’s development is an encouraging sign of the client’s engagement with her pregnancy journey.

The other statements, while they can reflect aspects of pregnancy, don't directly connect with the unique awareness of fetal movements. Nausea in the morning, changes in skin sensitivity, and increased sleep needs are valid considerations during pregnancy, but they do not connect as significantly to the direct experience of the developing fetus.