Answer: Dr. J.M. Tanner proposed a five-stage system to grade breast and pubic hair development in girls and genital and pubic hair development in boys. TANNER STAGES OF PUBERTAL DEVELOPMENT IN GIRLS Breast Development Pubic Hair Development Elevation of papilla only No pubic hair Breast budding Scattered labial hair Enlargement of breasts without areola separation [...]

Answer: No.  It appears that the HPG axis is intact as early as 20 weeks of life. Pituitary gonadotrophs have been found to produce LH and FSH at this gestational age, and in boys testicular testosterone is essential for normal internal and external genital development. In female fetuses, functional ovarian cysts are occasionally seen. These [...]