Gestation is 9 months in humans. birth and labor can be any length of time
Maintain a weight below the normal range.
Measure your heart rate before, during and after work outs and write it down. Monitors can be worn as a strap across the chest, on the wrist and even on the head, and by measuring your heart rate can help you exercise at the right intensity. Most don't have a display, so you'll need to connect your monitor with a sports watch or smartphone app to see your heart rate.
Socialization of children is important because it sets the groundwork for all future socialization.