Final answer:
Monophasic oral contraceptives have a fixed dose of both a progestins drug and an estrogens drug.
Step-by-step explanation:
Monophasic oral contraceptive drugs have a fixed dose of both a progestins drug and an estrogens drug. This means that each pill in the pack contains the same amount of hormones. The combination of progestins and estrogens helps to prevent pregnancy by suppressing ovulation, thickening cervical mucus, and thinning the lining of the uterus.
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