Question

Which of the following is MOST LIKELY to contribute to the reduced efficacy of the progesterone-only pill (POP) compared to the combined oral contraceptive (COC)?

A) Lower hormone levels in the POP

B) Inconsistent timing of the POP intake

C) Higher risk of drug interactions with the POP

D) Lower acceptability and adherence to the POP

Answer 1

The most likely contributor to the reduced efficacy of the progesterone-only pill compared to combined oral contraceptives is inconsistent timing of pill intake, as it requires strict adherence to prevent ovulation.

Step-by-step explanation:

The efficacy of the progesterone-only pill (POP) compared to the combined oral contraceptive (COC) is most likely reduced due to B) Inconsistent timing of POP intake. The progesterone-only pill requires strict adherence to a consistent daily schedule to maintain its efficacy in preventing ovulation.

Since the hormone levels in the POP are lower and it doesn't contain estrogen, any delay or inconsistency in taking the pill can result in insufficient hormone levels to prevent ovulation. This can lead to an increased chance of pregnancy compared to COCs, which have a slightly more forgiving window due to higher hormone levels and the presence of estrogen.