What is Segesterone Acetate and Ethinyl Estradiol: Uses, Dosage, Side Effects and More

Segesterone acetate and ethinyl estradiol is a flexible vaginal ring that provides birth control for three weeks at a time. This hormone combination works by releasing synthetic versions of progesterone and estrogen directly into your body through the vaginal wall.

The ring offers a convenient, long-acting contraceptive option that you can manage yourself. Unlike daily pills, you simply insert it once and leave it in place for 21 days, then remove it for a week-long break.

What is Segesterone Acetate and Ethinyl Estradiol Used For?

This vaginal ring is primarily used to prevent pregnancy in women who can become pregnant. It's designed for those who want reliable birth control without the daily routine of remembering to take a pill.

The ring is particularly helpful for women who have trouble remembering daily medications or those who experience stomach upset with oral contraceptives. Since the hormones are absorbed directly through vaginal tissue, they bypass your digestive system entirely.

Some doctors may also prescribe this combination to help regulate menstrual cycles or reduce heavy menstrual bleeding. However, pregnancy prevention remains its primary and most common use.

How Does Segesterone Acetate and Ethinyl Estradiol Work?

This combination works by preventing ovulation, which means your ovaries won't release an egg each month. The segesterone acetate (a synthetic progestin) is the primary hormone responsible for stopping ovulation.

The ethinyl estradiol (a synthetic estrogen) works alongside the progestin to provide additional contraceptive effects. It helps thicken your cervical mucus, making it harder for sperm to reach any egg that might be released.

This is considered a moderately strong contraceptive method when used correctly. The hormones are released continuously over the three-week period, maintaining consistent levels in your bloodstream. The ring delivers about 0.15 mg of segesterone acetate and 0.013 mg of ethinyl estradiol daily.

How Should I Take Segesterone Acetate and Ethinyl Estradiol?

You'll insert the flexible ring deep into your vagina using clean hands, similar to inserting a tampon. The exact position doesn't matter as long as it's comfortable and stays in place.

Leave the ring in place for exactly 21 days, then remove it for 7 days. During this ring-free week, you'll typically have your menstrual period. After the 7-day break, insert a new ring to continue protection.

You don't need to take this with food or water since it's not an oral medication. However, wash your hands thoroughly before insertion and removal. The ring can stay in place during bathing, swimming, and sexual activity.

If the ring accidentally comes out, rinse it with cool water and reinsert it within 3 hours. If it's been out longer than 3 hours during the first two weeks of use, you may need backup contraception for the next 7 days.

How Long Should I Take Segesterone Acetate and Ethinyl Estradiol For?

You can use this vaginal ring for as long as you need contraception and don't experience problematic side effects. Many women use hormonal contraceptives for several years without issues.

Your doctor will likely want to see you every 6 to 12 months to check your blood pressure and overall health. They'll also discuss whether this method is still working well for your lifestyle and health needs.

If you're planning to become pregnant, you can stop using the ring at any time. Fertility typically returns quickly after discontinuation, often within the first month after removal.

What Are the Side Effects of Segesterone Acetate and Ethinyl Estradiol?

Most women experience few or no side effects with this vaginal ring. When side effects do occur, they're often mild and may improve after the first few months of use.

The most common side effects you might experience include:

• Irregular bleeding or spotting between periods
• Breast tenderness or swelling
• Headaches or mild mood changes
• Nausea or stomach discomfort
• Vaginal discharge or irritation
• Weight changes (usually small)

These side effects typically become less noticeable as your body adjusts to the hormones over 2-3 months.

More serious but rare side effects can include blood clots, stroke, or heart attack. While these complications are uncommon, especially in healthy young women, it's important to watch for warning signs like severe leg pain, chest pain, severe headaches, or vision changes.

Contact your healthcare provider immediately if you experience sudden severe symptoms, persistent heavy bleeding, or signs of infection like fever with pelvic pain.

Who Should Not Take Segesterone Acetate and Ethinyl Estradiol?

This vaginal ring isn't safe for everyone. Your doctor will review your medical history to determine if it's appropriate for you.

You should not use this ring if you have certain health conditions that increase your risk of serious complications:

• History of blood clots, stroke, or heart attack
• Breast cancer or other hormone-sensitive cancers
• Liver disease or liver tumors
• Unexplained vaginal bleeding
• High blood pressure that's not well controlled
• Migraine headaches with visual symptoms (aura)
• Pregnancy or suspected pregnancy

Women over 35 who smoke cigarettes face a higher risk of blood clots and should discuss alternative contraceptive methods with their doctor.

If you have diabetes, high cholesterol, or a family history of blood clots, your doctor will carefully weigh the benefits and risks before prescribing this method.

Segesterone Acetate and Ethinyl Estradiol Brand Name

This medication is available under the brand name Annovera. It's the first and currently only vaginal ring that can be used for an entire year.

Unlike other vaginal rings that require monthly replacement, Annovera is designed to be reused for 13 cycles (about one year). You use the same ring for 21 days, then store it safely for 7 days before reinserting it.

Segesterone Acetate and Ethinyl Estradiol Alternatives

If this vaginal ring isn't right for you, several other effective contraceptive options are available. Your doctor can help you choose the best method based on your health, lifestyle, and preferences.

Other hormonal options include birth control pills, patches, injections, and implants. Each has different advantages in terms of convenience, side effects, and effectiveness.

Non-hormonal alternatives include copper IUDs, barrier methods like diaphragms, and fertility awareness methods. These options don't contain hormones but may require more active participation in your contraceptive routine.

Is Segesterone Acetate and Ethinyl Estradiol Better Than NuvaRing?

Both vaginal rings are highly effective at preventing pregnancy, but they have some key differences. The main advantage of segesterone acetate and ethinyl estradiol (Annovera) is that you can use the same ring for an entire year.

NuvaRing requires a new ring each month, which can be more expensive over time and requires more frequent pharmacy visits. However, NuvaRing has been available longer and has more extensive research data.

Both rings have similar effectiveness rates and side effect profiles. The choice between them often comes down to personal preference, cost considerations, and your doctor's recommendation based on your individual health profile.