Periods and bleeding on hormone therapy

Why a progestogen changes bleeding

If you have a uterus and take systemic estrogen, you also need a progestogen, such as micronized progesterone, to keep the uterine lining from overgrowing. The Menopause Society notes that women with a uterus need estrogen plus a progestogen to protect against uterine cancer. How the progestogen is scheduled determines whether you bleed.

When progesterone is taken for part of each month and then stopped, the lining sheds, producing a bleed much like a period. When it is taken every day alongside estrogen, the lining stays thin and, after an adjustment period, bleeding usually stops.

The two main regimens

The FDA-approved micronized progesterone label, for example, describes a dose taken at bedtime for 12 days of each 28-day cycle to prevent endometrial overgrowth in postmenopausal women taking estrogen. Cyclic regimens are often used in perimenopause and in the first year or so after the final period, when the ovaries may still produce occasional hormone surges. Continuous regimens are usually used once you are further past menopause.

• Cyclic or sequential: estrogen every day, with progesterone for about 12 to 14 days each month. A withdrawal bleed usually follows the progesterone days.
• Continuous combined: estrogen and progesterone every day. The aim is no bleeding once the body settles.

What is expected early on

On a cyclic regimen, the bleed should come at roughly the same point each month, after the progesterone days. It may be lighter or heavier than your old periods.

On a continuous regimen, irregular spotting or light bleeding is common in the first three to six months while the lining adjusts. It usually fades over that time. Keeping a simple log of bleeding days helps you and your clinician see whether it is settling.

Bleeding that should be checked

MedlinePlus advises contacting a provider about vaginal bleeding that restarts after 12 months without a period, even if small, and notes that abnormal bleeding can be linked to endometrial cancer. Most bleeding on hormone therapy turns out to be benign, but checking is important because problems found early are very treatable. Evaluation may involve an ultrasound or a biopsy, which your clinician can help arrange locally.

• Bleeding on a continuous regimen that continues beyond about six months
• Bleeding that restarts after you have had no bleeding for several months
• Heavy bleeding, clots or bleeding lasting much longer than usual
• Bleeding at the wrong point in a cyclic regimen, such as between expected bleeds
• Any bleeding after menopause if you are not on hormone therapy
• Bleeding after sex or with pelvic pain

Other causes of bleeding on HRT

Adjusting the dose, schedule or form of progestogen often resolves troublesome bleeding once more serious causes have been ruled out.

• Missed or late progesterone doses
• Inconsistent use or absorption of skin-applied estrogen
• An estrogen dose that is high relative to the progestogen
• Interacting medicines or supplements
• Polyps or fibroids in the uterus
• Inadequate endometrial protection, for example relying on progesterone cream instead of an oral capsule

Keeping a useful bleeding record

A simple diary makes these conversations much easier. Note each day you bleed or spot, how heavy it is, whether there are clots, any pain and where you are in your progesterone schedule. Many period-tracking apps work well for this.

Bring the record to follow-up visits. A pattern such as bleeding that consistently starts a few days before the progesterone phase ends, or spotting that is steadily fading, tells your clinician far more than a general description.

Knowing when you have reached menopause

If you start hormone therapy in perimenopause, the withdrawal bleeds of a cyclic regimen can mask when your natural periods would have stopped. There is no perfect test for this. Your clinician may suggest moving to a continuous regimen after a period of time, usually based on your age and how long you have been treated, and watching for whether bleeding settles.

Contraception is another consideration in perimenopause, because hormone therapy at menopausal doses does not prevent pregnancy. The Menopause Society advises using contraception until menopause is confirmed.

How HealifyMD supports this

Your HealifyMD clinician will explain which regimen you are on, what bleeding pattern to expect and what to report. If bleeding needs in-person evaluation, they will tell you and help you arrange it.

HealifyMD's hormone therapy plan for women is $349 for the first month (including the evaluation and baseline labs), then $99/month, with estradiol, estriol vaginal cream and progesterone included in the hormone therapy program. Compounded hormones are not FDA-approved and are not equivalent to branded products. Other labs are priced separately, and your price is confirmed at the eligibility review.