In adolescent brain development, myelination and maturation occur in sequence, proceeding from the _____.

Polymenorrhea: menstrual cycles with interval < 21 days.

The onset of menstruation, usually occurring between 10 and 14 years old, is called?     

Prepubertal:  B/Cx ratio is _____,Postmenopausal:  B/Cx ratio is ______?

The Follicular phase in ovaries correlates with the___________ phase in the endometrium?    

The perimetrium is visualized on B Mode Sonography?

Secretory phase is characterized by?

Menopause: cessation of menses > ______ months?

Gonadotrophin hormones are?

Montessori schools focus on using materials and projects in such a way that children have a strong sense of accomplishment.