Ambien duration of action. The half-life of Ambien is only about 1.5 hours. In fact, the main ingredient in Ambien-zolpidem â hits peak levels in the blood after only 30 minutes. This is why itâs important to take Ambien immediately before going to bed.mbien time in the body. After more than a day or two, itâs unlikely that Ambien will still be present in the blood. Ambien will show up on urine screens for 1-2 days, but can stay present in hair samples for 90 days or even longer.
1 Puberty is the period of sexual maturation and achievement of fertility.  The time when puberty begins varies greatly among individuals; however, puberty usually occurs in girls between the ages of 10 and 14 and between the ages of 12 and 16 in boys.
Puberty and Periods. Menstruation (a period) is a major stage of puberty in girls. It's one of the many physical signs that a girl is turning into a woman. Menstruation can be confusing, just like a lot of the other changes that come with puberty. Some girls can't wait to start their periods.