Final answer:
The correct time-based description of a stage of development in pregnancy is Term, which refers to the period from the beginning of 38 weeks of gestation to the end of 42 weeks of gestation. This is the normal duration of pregnancy, and it is during this stage that labor and childbirth typically occur.
Step-by-step explanation:
The correct time-based description of a stage of development in pregnancy is Term. Term refers to the period from the beginning of 38 weeks of gestation to the end of 42 weeks of gestation. This is the normal duration of pregnancy, and it is during this stage that labor and childbirth typically occur.