2* At eight weeks most of the features of the adult are visible, when it is referred to as a fetus. 'DURING' THE FIRST FEW WEEKS, IT IS NEITHER MALE NOR FEMALE. HOWEVER, a small group of cells, called the "indifferent gonads" begin to form, that are capable of becoming ovaries or testicles.
3* "THE GENETIC SEX OF A CHILD 'IS' ESTABLISHED AT CONCEPTION BASED ON THE 23RD PAIR OF CHROMOSOMES IT INHERITS. The mother's egg contains an X chromosome, and the father's sperm will contain either an X or Y chromosome. It is the male (or rather the male's sperm) that dictates whether the baby will be a boy or a girl."