What is the function of the mammary gland?

What is the yellowish fluid produced during the initial days of lactation after parturition called?

The activity of formation of milk is regulated by the activity of $A$. While the ejection of milk is controlled by $B$ hormone. Here,$A$ and $B$ refers to:

Which of the following mammals has the highest percentage of lactose in its milk?

Sometimes the labor pains are less and uterine contractions have to be induced. What do you think the doctors inject to facilitate delivery?

The mammary gland is a modification of which of the following glands in Eutherians?