Progestogen-only pill

Progestogen-only pills or progestin-only pills (POP) are contraceptive pills that contain only synthetic progestogens (progestins) and do not contain estrogen. They are colloquially known as mini pills.

Although such pills are sometimes called "progesterone-only pills", they do not actually contain progesterone, but one of several chemically related compounds; and there are a number of progestogen-only contraceptive formulations.