Medication guide

The estradiol ring (Femring)

Full-body estrogen, delivered by a ring you replace every three months.

First, an important distinction. Femring is not the same as low-dose vaginal estrogen rings or creams. Those treat vaginal symptoms only. Femring delivers a systemic dose — estradiol that reaches your whole body — so it treats hot flashes, night sweats, and sleep disruption and vaginal dryness, irritation, and painful sex, all from one ring. Because it's systemic, the same rules apply as with a patch or gel: if you have a uterus, you take progesterone alongside it.

How it works

Femring is a soft, flexible silicone ring, about two inches across. Once inserted, it releases a slow, steady dose of estradiol — the same estrogen your ovaries produced — which is absorbed through the vaginal wall directly into your bloodstream. Like a patch or gel, it bypasses the liver, which is part of why we use transdermal and vaginal routes in the first place.

It comes in two strengths, 0.05 mg/day and 0.10 mg/day, and one ring works continuously for 90 days.

Why we use it

The ring is an option for members whose estrogen dose is already established and stable. During titration — the first months, when we're adjusting your dose based on how you actually feel — you need a format we can change week to week, which is why everyone starts on a patch or gel. Once your dose is dialed in, the ring offers something those can't: nothing to remember daily or weekly, no adhesive, no application. You insert it, and for three months it simply works.

Relief of hot flashes and night sweats typically begins within 1–2 weeks of insertion. Vaginal symptoms improve over the following weeks — though many women still need a low-dose vaginal estrogen cream or tablet alongside the ring to fully treat dryness, irritation, or painful sex. If that's you, it's normal, and we'll build it into your plan.

Inserting the ring

Wash and dry your hands, and get comfortable — lying down or standing with one leg up both work.

Press the sides of the ring together between your thumb and index finger, or twist it into a figure-eight.
Use your index finger to push the folded ring into the vagina as far as you comfortably can.

The exact position doesn't matter — the ring works wherever it sits. If you can feel it or it's uncomfortable, it isn't in far enough; push it a little further. Most women can't feel it at all once it's placed. Wash your hands when you're done, and mark your calendar for 90 days out.

Removing the ring

With clean hands, put a finger into your vagina, hook it through the ring, and gently pull down and forward.
Wrap the used ring in tissue and put it in the trash — don't flush it. Wash your hands.

If you're continuing treatment, insert the new ring right away.

Living with it

Sex: the ring can stay in during intercourse. Most partners don't notice it. If you prefer to remove it, rinse it with warm water and reinsert it afterward.
If it comes out: rinse it with warm water and put it back in. This can happen with a hard bowel movement or if it wasn't placed far enough in. If it comes out often, message us — the ring may not be the right format for you.
Vaginal infections: if you need treatment for a yeast infection or similar, the ring can stay in place during treatment.
Discoloration: contact with blood can discolor the ring. This doesn't affect how it releases medication.
Bathing, swimming, exercise: no restrictions. The ring stays put through all of it.

What you might notice early on

The most common early effects are the same ones we see with any estrogen start or format change: headache, breast tenderness, light spotting or bleeding, and occasionally vaginal irritation or a yeast infection. These typically settle as your body adjusts. If anything bothers you or doesn't fade, log it in your tracker and message us — adjusting is what we do.

One thing that always gets checked: unusual or heavy vaginal bleeding. It's usually benign, but it's never something we ignore. Message us promptly so we can evaluate it.

Go to urgent care or the ER if you have:

Sudden severe headache, or changes in vision or speech
Difficulty removing the ring
Fever with vomiting, diarrhea, muscle pain, dizziness, or a sunburn-like rash — remove the ring first, then go. These are warning signs of toxic shock syndrome, which is rare but serious.

The 90-day rhythm

After 90 days, the ring no longer releases enough medication to hold your levels steady — and unsteady levels are exactly what we're avoiding. Replace it on schedule, every time. Put the swap date in your phone the day you insert a new ring.

Cost

If you have commercial insurance, the manufacturer's co-pay program can bring each 90-day ring down to as little as $25 — download the card at Femring.com. The program excludes Medicare, Medicaid, TRICARE, and other government-funded coverage.

Go deeper

For the full picture of how estrogen works, what it treats, the safety evidence, and what to expect month by month, read Estrogen: the in-depth guide.