Sexuele Voorlichting Puberty Sexual Education For Boys And Girls (BEST × 2025)

These chemicals act as messengers, telling the body to grow up.

Common changes include breast development, widening of the hips, and the onset of menstruation (menarche), which usually occurs around age 12 or 13. These chemicals act as messengers, telling the body

: New, sometimes intense, feelings and interests in romantic relationships often emerge. Gender-Specific Changes Primary Changes Growth of the penis and testicles. Breast development (breast "buds"). Key Milestones These chemicals act as messengers

His voice began to "crack" at the worst moments—squeaking like a balloon during a presentation. Meester Jan explained that his vocal cords were thickening, and soon he’d have a deeper voice and perhaps even a bit of facial hair. widening of the hips