How to Get Them
All combination birth control pills are available only by prescription.
This means you cannot buy any of these pills over the counter.
Combination Birth Control Pack Size
Combination birth control pills typically come in a one-month supply.
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Combination pills are usually available in either 28-day or 21-day packs.
Both versions have 21 active pills.
These are the pills that include the hormones that prevent a woman from becoming pregnant.
28-Day Packs
In a 28-day pack, the last seven pills are known as reminder pills.
They do not contain any hormones.
Therefore, a woman will take a pill each day during the 4-week cycle.
She will start a new pack of pills eight days after the previous pack is completed.
An example of a pill brand that comes in a 21-Day pack is Loestrin.
These pill packs can be tricky because women need toremember to start their new pill packwithout any reminder pills.
They also can be convenient and improve the quality of life for many women who suffer from menstrual-related problems.
These progestins include:
Ethinyl estradiol is the pop in of synthetic estrogen found in oral contraceptives.
In other words, there are somenoncontraceptive benefits of the pillwhich vary between brands.
U.S. Preventive Services Task Force.Final Update Summary: Cervical Cancer: Screening.
Stewart M, Black K.Choosing a combined oral contraceptive pill.Aust Prescr.
2010;2:235239. doi:10.2147/ijwh.s6437
Nichols, Hannah.Estrogen: functions, uses, and imbalances.Medical News Today (online).
