In human adult females,oxytocin:

Which of the following is a gonadotropic hormone?

Select the correct option for each statement:
$(1)$ Hormones are non-nutrient/nutrient chemicals which act as intercellular messengers and are produced in trace amounts.
$(2)$ The posterior pituitary gland is under the direct neural/endocrine regulation of the hypothalamus.
$(3)$ The hormone produced by the posterior pituitary gland is oxytocin/prolactin.

The pituitary gland is derived from which germ layer?

What is the primary function of $Oxytocin$?

$A$: Oxytocin stimulates contraction of uterine muscles during birth and initiates ejection of milk.
$R$: It is synthesized in the posterior lobe of pituitary.