ella is a brand name for the emergency contraceptive pill containing the active ingredient ulipristal acetate [1]. It is designed to prevent pregnancy after unprotected sex or contraceptive failure.
How does ella work to prevent pregnancy?
Ella works by delaying or preventing ovulation, the release of an egg from the ovary [1]. It achieves this by affecting the action of progesterone, a hormone crucial for the reproductive cycle. Ulipristal acetate binds to progesterone receptors, altering the hormonal signals that trigger ovulation. It may also thicken cervical mucus, making it more difficult for sperm to reach an egg, although its primary mechanism is through the postponement of ovulation [1].
How soon after unprotected sex can ella be taken?
ella is most effective when taken as soon as possible after unprotected intercourse. It can be taken up to 120 hours (5 days) after intercourse, but its efficacy decreases over time within this window [1]. Studies show it remains effective for the full 5-day period.
Where can I get ella?
In the United States, ella is available by prescription only [1]. This means a healthcare provider must prescribe it. It can then be obtained from a pharmacy.
How does ella compare to other emergency contraception options?
The most common alternative to ella is levonorgestrel-based emergency contraceptive pills, such as Plan B One-Step and its generics. While both types of pills are designed to prevent pregnancy after unprotected sex, ella has demonstrated a higher efficacy rate, particularly when used later in the 5-day window after intercourse [1]. ella is also a prescription medication, whereas some levonorgestrel-based options are available over-the-counter.
What are the side effects of ella?
Common side effects reported with ella include headache, nausea, abdominal pain, fatigue, and menstrual irregularities (such as earlier or later periods) [1]. These side effects are typically temporary.
Can ella be used more than once in a menstrual cycle?
It is not recommended to use ella more than once in a single menstrual cycle. Repeated use within a short period may disrupt your menstrual cycle and potentially affect the timing of your period [1].
How does menstrual cycle timing affect ella's effectiveness?
ella's effectiveness is influenced by where a person is in their menstrual cycle at the time of unprotected intercourse. It works by delaying ovulation. If ovulation has already occurred, ella may not be effective in preventing pregnancy [1].