ellaOne® delays ovulation when it matters most

Ovulation is a result of a surge in luteinising hormone (LH). ellaOne® delays ovulation by inhibiting or delaying the LH surge.1  

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If the woman is due to ovulate tomorrow or the next day after unprotected sex, when the risk of pregnancy is highest, only ellaOne® can delay ovulation

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This is when LH has started to surge but has not yet peaked. At this time, levonorgestrel will not prevent the follicle from rupturing whereas ellaOne® is highly effective1

Intake after LH surge, but before peak1

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If she is due to ovulate 3 or more days after unprotected intercourse, both ellaOne® and levonorgestrel can delay ovulation. 1 However, ellaOne® remains more effective in preventing follicle rupture and therefore unintended pregnancy.1

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Intake before LH surge1

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If the woman has already ovulated, or is due to ovulate, in the immediate 24 hours following unprotected intercourse, no emergency contraceptive pill will help1

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This is because the LH has already peaked, meaning the ovulation process is at a point where it cannot be stopped, or has already happened.

This explains why:

• Speed of emergency contraceptive pill intake is critical
• Emergency contraception is not 100% effective

Intake after LH peak 1

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ellaOne® can delay ovulation even when it is about to happen (when risk of fertilisation is highest)1

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References

1.Brache V et al. Contraception 2013; 88(5): 611-618.

2.Glasier AF et al. The Lancet 2010; 375: 555-562.