Which of the following is a progestin-only pill formulation?

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Multiple Choice

Which of the following is a progestin-only pill formulation?

A progestin-only pill contains no estrogen; it relies on a single progestin to prevent pregnancy by thickening cervical mucus and thinning the endometrium, with some effect on ovulation. Errin is a norethindrone-only formulation, so it fits this category. The other options pair estrogen with a progestin (combined contraceptives) or use a patch that contains estrogen as well, so they are not progestin-only. Yasmin 28 and Yaz include ethinyl estradiol plus a progestin, and Xulane is a transdermal patch with estrogen and progestin.

A progestin-only pill contains no estrogen; it relies on a single progestin to prevent pregnancy by thickening cervical mucus and thinning the endometrium, with some effect on ovulation. Errin is a norethindrone-only formulation, so it fits this category. The other options pair estrogen with a progestin (combined contraceptives) or use a patch that contains estrogen as well, so they are not progestin-only. Yasmin 28 and Yaz include ethinyl estradiol plus a progestin, and Xulane is a transdermal patch with estrogen and progestin.

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