Morning After Calculator Usa
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Reviewed by Calculator Editorial Team
Emergency contraception, also known as the "morning after pill," is a method of preventing pregnancy when other forms of birth control have failed. In the USA, several options are available, each with different effectiveness rates and potential side effects. This calculator helps you understand your options and make an informed decision.
Overview of Emergency Contraception
Emergency contraception is a form of birth control used to prevent pregnancy after unprotected sex or when other forms of contraception have failed. The most common method in the USA is the morning-after pill, which contains levonorgestrel or ulipristal acetate.
Important Note
Emergency contraception is not a form of abortion. It works by preventing ovulation or thickening cervical mucus to block sperm. It does not remove an existing pregnancy.
Emergency contraception should be used as soon as possible after unprotected sex, ideally within 72 hours. However, it can be effective up to 5 days after unprotected intercourse, depending on the method used.
Available Methods in the USA
There are two primary types of emergency contraception available in the USA:
Plan B One-Step
Plan B One-Step contains levonorgestrel and is available over the counter without a prescription. It is effective for up to 72 hours after unprotected sex.
Ella
Ella contains ulipristal acetate and is also available over the counter. It is effective for up to 5 days after unprotected sex and is often preferred for its longer window of effectiveness.
Effectiveness Formula
The effectiveness of emergency contraception is calculated based on the time since unprotected sex and the method used. Plan B One-Step is most effective within 24 hours, while Ella remains effective for up to 5 days.
Effectiveness Rates
The effectiveness of emergency contraception varies depending on the method and the time since unprotected sex. Here are the general effectiveness rates:
- Plan B One-Step: 95% effective within 24 hours, 88% effective within 48 hours, and 76% effective within 72 hours.
- Ella: 99% effective within 24 hours, 95% effective within 48 hours, 91% effective within 72 hours, and 87% effective within 5 days.
These rates are based on clinical studies and may vary slightly depending on individual factors.
Common Side Effects
Emergency contraception can cause side effects, though they are usually mild and temporary. Common side effects include:
- Nausea
- Headache
- Breast tenderness
- Fatigue
- Mood changes
Serious side effects are rare but can include severe allergic reactions, irregular bleeding, or changes in menstrual patterns. If you experience any severe side effects, seek medical attention immediately.
When to Use Emergency Contraception
Emergency contraception should be used when:
- You have had unprotected sex and are not using another form of birth control.
- You have missed a dose of your regular birth control method.
- You are at high risk of pregnancy due to fertility issues or other medical conditions.
Important Consideration
Emergency contraception should not be used as a regular form of birth control. It is meant for emergency situations only.
Frequently Asked Questions
How soon after unprotected sex should I take emergency contraception?
Emergency contraception should be taken as soon as possible after unprotected sex. Plan B One-Step is most effective within 72 hours, while Ella remains effective for up to 5 days.
Can I take emergency contraception if I'm already pregnant?
No, emergency contraception cannot terminate an existing pregnancy. It is only effective in preventing pregnancy after unprotected sex.
Are there any side effects I should be aware of?
Common side effects include nausea, headache, breast tenderness, fatigue, and mood changes. Serious side effects are rare but can include severe allergic reactions or irregular bleeding.
Can I use emergency contraception if I'm breastfeeding?
It is recommended to consult with a healthcare provider before using emergency contraception while breastfeeding, as the effects on the baby are not fully understood.
Is emergency contraception covered by insurance?
In the USA, emergency contraception is covered by most insurance plans without a copay or deductible. However, some plans may require prior authorization.