Differences Between Monophasic, Biphasic, and Triphasic Pills
Combination birth control pillsareoral contraceptivesthat combine ethinyl estradiol and progestin.
Even though all combination birth control pills have estrogen, they can differ in how much estrogen they contain.
Combination birth control pills also differ from one another in the amount andtype of progestinin eachpill brand.
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This article explains the differences between monophasic and multiphasic (biphasic and triphasic) combination birth control pills.
There is no “best” birth control pill brand or jot down.
However, some pills may help tominimize certain side effects.
All combination birth control pills are equally effective in preventing pregnancyas long as the pills areused consistently and correctly.
Multiphasic birth control pills were developed during the 1980s.
These pills were originally developed to help lessen the side effects of monophasic birth control pills.
They are also designed to more naturally mimic your body’s menstrual cycle.
Low estrogen, monophasic pills may cause less bloating or breast tenderness but they may result in morespotting.
Most people find that a monophasic birth control pill brand tends to be a good first choice.
The progestin/estrogen ratio is usually lower during the first half of the cycle.
During the second half of the cycle, the progestin/estrogen ratio tends to be higher.
The last seven days (if included) are placebo pills and do not contain hormones.
Depending on the pill brand, the amount of estrogen may change as well as the amount of progestin.
The first few pills are one strength (and one color) in each pill pack.
The next phase of pills is another strength (and another color).
The final phase of pills also changes strength and is a different color.
The last seven pills (if included) are placebo pills, so they do not contain hormones.
Summary
Combination birth control pills combine ethinyl estradiol and progestin.
All combination birth control pills have estrogen but differ in how much they contain.
Pills also vary in the amount and key in of progestin.
There is no single best choice of combination birth control pills.
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