03· Hormones · women

A five-day course. Timed to your cycle.

Clomiphene citrate is an FDA-approved tablet used to bring on ovulation in women who are not ovulating regularly and want to become pregnant. A licensed clinician reviews your history and labs first; if it fits, a short course is prescribed and timed to your cycle, and sometimes the honest answer is that it does not fit.

Book a doctor visit How it works

Prescription required. A licensed provider decides whether treatment is appropriate.

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At a glance

Oral tabletFive days a cycle

FDA-approvedFor ovulatory dysfunction

Checked firstPregnancy excluded, ovaries scanned

What it is

A tablet that asks your body to ovulate.

Clomiphene citrate is an oral selective estrogen receptor modulator: a medicine that blocks estrogen's signal in some tissues. It has been prescribed for ovulation for more than fifty years and is FDA-approved, as Clomid and as generic tablets, for one job: treating ovulatory dysfunction in women who want to become pregnant. It is not a hormone. It does not treat perimenopause, menopause or low estrogen, and it only works when the ovaries can still respond, so it is not a fit for primary ovarian insufficiency.

The usual tablet is 50 mg, taken for five days early in the cycle. The same compound is sometimes prescribed off-label in other settings, for example a trial course in hypothalamic amenorrhea when estrogen levels are adequate, but its approved use is ovulation for pregnancy, and that is what this page is about. If a clinician prescribes it, it is dispensed or prepared in your name by a licensed US pharmacy and shipped sealed.

The honest line

FDA-approved for one job: ovulation, for pregnancy. Not a hormone, and not for perimenopause or menopause.

01Prescription only. A licensed clinician decides whether it is appropriate for you.

02Dispensed in your name by a US state-licensed pharmacy, sealed.

03Reviewed on a schedule, with labs. Changed or stopped on evidence.

How it works

How it works, in three moves.

A selective estrogen receptor modulator: it changes what the brain hears, and the brain answers.

Blocks the estrogen signal

Clomiphene occupies estrogen receptors in the hypothalamus, so the brain reads estrogen as lower than it is.

The brain raises the signal

It answers with more GnRH, and the pituitary releases more FSH and LH, the hormones that recruit and ripen a follicle.

A follicle matures and releases

If the ovary responds, a follicle grows and ovulation usually follows 5 to 10 days after the last tablet.

Who it is for

Who it is prescribed for.

A clinician decides on your history, your cycles and your labs. These are the situations it is usually considered for.

01
Ovulatory dysfunction
Cycles that are irregular, long or absent because ovulation is not happening, in a woman who wants to become pregnant.
02
PCOS-related anovulation
Polycystic ovary syndrome is the most common reason. International guidelines now rank letrozole first for PCOS; clomiphene, alone or with metformin, remains an evidence-based alternative.
03
Part of a fertility work-up
Only after other causes are checked: thyroid, prolactin, tubes, uterus and a partner's semen analysis. For unexplained infertility, clomiphene with timed intercourse alone is not recommended.

Not the right fit when

Pregnancy, or any chance of it: pregnancy is excluded before every course.
Primary ovarian insufficiency or pituitary failure: the ovaries cannot answer the signal.
Liver disease, now or in the past.
Ovarian cysts or enlargement not caused by PCOS.
Abnormal uterine bleeding that has not been evaluated.
Uncontrolled thyroid or adrenal disease, or a pituitary tumor.
Perimenopause or menopause symptoms: clomiphene is not a hormone therapy.

Your clinician goes through this with you on the visit. Some histories rule it out; if yours does, you are told plainly and offered what they would look at instead.

The visit

What your clinician looks at.

A real visit by video, usually within minutes of starting. They ask, you ask, and they decide whether treatment is appropriate. Sometimes the answer is no.

Book a doctor visit

Prescription required. A licensed provider decides whether treatment is appropriate.

01
Your history and cycles
Age, how long you have been trying, cycle length and pattern, previous pregnancies, weight, medicines, and anything that points to another cause.
02
Labs that explain the cycle
TSH and prolactin, and where indicated FSH, estradiol, androgens and AMH. Liver function is checked, and pregnancy is excluded before each course.
03
The rest of the picture
A pelvic ultrasound to rule out cysts before a course and to watch follicles when needed, tubal or uterine checks as indicated, and a semen analysis for a partner. Some of this happens at a local clinic or lab, not on video.

How it is taken

A short course, on a schedule.

01
Five days, early in the cycle
The usual start is 50 mg once a day for five days, beginning on or about day 5 of a period or a withdrawal bleed. If there is no ovulation, the next course may be 100 mg a day, the maximum on the label.
02
Timing intercourse
Ovulation most often happens 5 to 10 days after the last tablet. An ovulation predictor kit, a mid-luteal progesterone test or an ultrasound confirms whether the course worked.
03
A limited number of courses
Three ovulatory courses without a pregnancy is the point to stop and reassess; the label advises against more than about six courses in total, and each new course waits for a check that the ovaries are not enlarged. Prolonged use is avoided; the label notes a possible link between long exposure and ovarian tumors.

What to expect

What happens, and when.

01
Ovulation
In many, not all. In pooled trials in PCOS about two in three women ovulated on clomiphene over their treatment; some needed the higher dose, and the rest did not respond.
02
Each cycle
Ovulating is not the same as conceiving. In trials of up to five cycles, about one in five women had a live birth with clomiphene; pregnancies on clomiphene miscarried at about the same rate as pregnancies on letrozole.
03
Over the months
Most pregnancies that happen on clomiphene happen within the first few ovulatory cycles. In one prospective cohort, 42% of women had a live birth within 12 months of starting, 56% among those who ovulated. After three ovulatory courses without a pregnancy, the next step is a different plan, not more of the same.

Side effects, plainly

What it can feel like.

Most people have none of these, some have one or two, and your clinician tells you what to watch for.

Hot flushes

The most common complaint, in about 1 in 10 women in the label's data. They stop when the course ends.

Bloating and pelvic discomfort

Ovarian enlargement was recorded in about 14% and abdominal or pelvic discomfort in about 6%. Tell your clinician about pain or swelling; the next course waits until it settles.

Mood changes

Irritability, low mood or tearfulness during and shortly after the course, reported by some women.

Breast tenderness, nausea, headache

Each affects a small minority, about 1 to 2% in the label's data, and is usually mild.

Visual symptoms

Blurring, spots or flashes in about 1.5%. Stop the tablets and contact your clinician the same day; an eye examination follows, and driving at night is unwise until it clears.

Twins and more

About 7 to 8% of clomiphene pregnancies are multiple, almost all twins; triplets or more are under 1%. This is the main reason courses are kept short and doses low.

Ovarian hyperstimulation (OHSS)

Rare with clomiphene but serious: rapid abdominal swelling, severe pain, vomiting or breathlessness in the days after a course needs urgent care.

This is not a complete list. Your clinician goes through the risks that apply to you before anything is prescribed, and is a message away if something does not feel right.

The evidence

What the research actually shows.

In the pooled clinical data on the FDA label, about 30% of 7,578 women treated with clomiphene became pregnant, and of pregnancies with known outcomes 7.98% were multiple (6.9% twins, 0.5% triplets).¹
In the largest US randomised trial in PCOS (750 women, up to five cycles), ovulation occurred in 48.3% of clomiphene cycles and 19.1% of women had a live birth, against 61.7% and 27.5% with letrozole; twin pregnancies were 7.4% with clomiphene and 3.4% with letrozole.²
A 2026 meta-analysis of randomised trials in PCOS found that on clomiphene 1,347 of 2,103 women ovulated, 486 of 2,111 became pregnant and 182 of 913 had a live birth, each lower than with letrozole, with a multiple pregnancy in 14 of 279.⁵
The 2023 international PCOS guideline recommends letrozole first and keeps clomiphene, alone or with metformin, as an alternative, noting the higher multiple-pregnancy risk and that cycles may need ultrasound monitoring.³

Clomiphene citrate tablets are FDA-approved and dispensed on prescription by a US state-licensed pharmacy. Availability varies by state.

Sources

FDA status

Clomiphene citrate is FDA-approved, as Clomid and as generic tablets, for the treatment of ovulatory dysfunction in women who want to become pregnant; any other use, including in hypothalamic amenorrhea or in men, is off-label.

Questions

Asked often.

Anything about your own health is answered by a licensed clinician on a visit, not here.

Will clomiphene help with perimenopause or 'balancing' my hormones?

No. Clomiphene is not a hormone and is not approved or used to treat perimenopause, menopause or low estrogen. If your goal is symptom relief rather than pregnancy, this is not the medicine, and a clinician will say so.

How many cycles will I take it?

Usually up to three ovulatory courses. If you ovulate three times without a pregnancy, or do not ovulate at the maximum labelled dose, the plan changes rather than continuing. The label advises against more than about six courses in total.

Do I need scans and blood tests?

Yes, some. Pregnancy is excluded before each course, the ovaries are checked for cysts, and ovulation is confirmed by a progesterone test, an ovulation kit or an ultrasound. Part of this happens at a local clinic or lab, not on video.

What are the chances of twins?

Around 7 to 8 pregnancies in 100 on clomiphene are twins; triplets or more are rare, under 1 in 100. Your clinician uses the lowest dose that makes you ovulate for this reason.

What if I don't ovulate on it?

Roughly one in three women with PCOS do not ovulate on clomiphene in trials. The next steps are letrozole, adding metformin, or gonadotropin injections and ovarian procedures in a fertility clinic. Not responding is information, not a failure.

Why might the answer be no?

Because the medicine does not fit: you are pregnant or could be, your ovaries or pituitary cannot respond, there is liver disease, unexplained bleeding or an ovarian cyst, or because a fertility clinic is the right place for your situation. Sometimes the answer is no, and we tell you why.

Not the right fit? Other directions.

If your goal is relief from perimenopause or menopause symptoms, clomiphene is not it; that is a conversation about menopausal hormone therapy or non-hormonal options with a clinician. If you have PCOS and are not ovulating, letrozole (itself off-label for this use) is now first line in international guidelines, and a clinician may prescribe it instead. If your periods have stopped because of low weight, stress or heavy training, the first work is restoring energy balance; ovulation induction comes later, and only once estrogen levels are adequate. If you are over 40, have known tubal or male-factor issues, or have already had three ovulatory courses, a fertility clinic is the better next step.

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