The talk test is a simple way to measure relative intensity. In general, if you're doing moderate-intensity activity you can talk, but not sing, during the activity. If you're doing vigorous-intensity activity, you will not be able to say more than a few words without pausing for a breath.
If you're asking about how old it is considered to be pregnant then if you get pregnant at age 25, your risk of having a baby with with Down Syndrome, for example, is about 1 in 1250, according to the National Institutes of Health. At age 40, the risk is 1 and 100. if you'll be 35 or older on your due date, you'll be offered genetic counseling. I hope I helped.
