Corrugated box design. Corrugated box design is the process of matching design factors for corrugated fiberboard boxes with the functional physical, processing and end-use requirements. Packaging engineers work to meet the performance requirements of a box while controlling total costs throughout the system.
And as they enter puberty, girls should get preventive checkups to learn about their reproductive health in a confidential setting, the doctors add. Girls are 12-13 years old, on average, when they get their first menstrual period (menarche), the committees note. That average age hasn't changed much in 30 years, though black girls go through menarche five months earlier than they did 30 years ago, according to the committees.
Girls usually have their first period about a year after the first signs of puberty (when they start to get taller and breasts start to grow), but the time this happens can vary a lot. Have a look at the topic 'Periods - what to do' for more information.