Once Every 3 Months Is Enough — A Clear Guide to Depo-Provera (Contraceptive Injection)
“Taking a pill every day is hard.” “I worry about forgetting a dose.” “I want to stop or lighten my periods.” For people with these concerns, Depo-Provera (contraceptive injection) is a chosen method of contraception.
Depo-Provera is a method in which one injection every 3 months maintains contraceptive effect, with no pills to forget and little room for failure in everyday life.
This article explains, in patient-friendly terms, the basics of Depo-Provera, its effects on menstruation and key points for trans men.
– Depo-Provera is an easy-to-continue contraceptive method injected “once every 3 months”.
– With continued use, many people find their periods become lighter or stop altogether, so contraception and menstrual control can be considered together, which is also useful for trans men.
– Concerns about contraception and menstruation are not something you need to carry alone, whatever your gender or lifestyle; choose the method that suits you in consultation with a healthcare provider.
Click any item in the table of contents to jump partway into the article.
What Is Depo-Provera (Contraceptive Injection)?
Depo-Provera is a contraceptive method injected once every 3 months.
The injection contains a hormone called progestin, which works to suppress ovulation and prevent pregnancy.
There is no need to take medication every day, and its great feature is the simplicity of “once you receive the injection, the next one is 3 months later”.
Features and Contraceptive Effect
Depo-Provera is a preparation with many advantages compared with medication taken orally, as below.
– Just 1 injection every 3 months
– No missed doses
– High contraceptive effect
– Many people find their periods become lighter or stop
It is a contraceptive method particularly suited to people such as the following.
Those who sometimes forget to take their pill
Those who feel daily dosing to be a burden
– With correct continued use: 99 percent or more
– With typical use: approx. 96 percent
are the reported figures.
Compared with pills that must be taken every day, a major advantage is that failures in taking medication are less likely to occur in real life.
Timing of the Injection
The timing of Depo-Provera is basically once every 12 weeks.
Basic schedule
– 1 injection every 3 months (12 weeks)
– However, the injection can still be given as usual within 12 to 15 weeks
Depo-Provera is basically administered every 12 to 13 weeks (approx. 3 months), but medically, administration within a range of 13 to 15 weeks is also considered to pose no problem for effectiveness.
Also, even if the next administration is somewhat earlier, there is no major problem with effectiveness or safety.
If you come to the clinic early
– The injection can be given without any problem even earlier than 12 weeks
– The scheduled date for the next one stays on the original schedule
If more than 15 weeks have passed
– The injection is possible, but additional contraception such as condoms is required for 7 days after the injection
– If you have had sex without contraceptive protection within the past 5 days, we may advise emergency contraception or a pregnancy test 2 to 4 weeks later
*At your visit, the doctor and nurse will check your situation and explain as they go, so please rest assured.
Menstruation After the Injection
There are individual differences in changes to periods after starting Depo-Provera.
– A small amount of bleeding continues
– The timing of periods becomes irregular
These are changes that readily occur in the first few months of use.
With Depo-Provera, the longer you continue, the less likely periods are to occur.
– At around 1 year, about half of users have no menstruation
– At around 2 years, around 70 percent of users have no menstruation
Quite a few people choose Depo-Provera for reasons such as “I want to stop my periods” or “I want to reduce my menstrual flow.”
Absence of menstruation is not a state that is bad for your body. If you have any symptoms that concern you, please consult us at any time.
How to Switch from the Pill to the Injection
Those using pills or mini pills can also switch to Depo-Provera.
– The injection is possible even when you are not menstruating
– Depending on the timing, we may ask you to continue the pill or use condoms alongside it for 7 days after the injection
– When to stop the pill
– Whether additional contraception is needed
These points will be checked by a doctor or nurse at your visit.
Even if you think “I don’t know when I should switch,” it is fine to simply come in and consult us.
Depo-Provera for Trans Men
Testosterone therapy is not contraception.
Even if you are amenorrheic, if you have sexual intercourse in which there is a possibility of contact with sperm, pregnancy is possible.
– High contraceptive effect
– High reliability in stopping menstruation
– No need to take medication every day
For this reason, for trans men (AFAB transgender people), it is one option that allows contraception and menstrual control to be considered at the same time.
At Idaten Clinic, as part of care in Gender Affirmation, we welcome consultations about stopping menstruation and about contraception.
We place importance not only on preventing pregnancy but also on reducing the physical and psychological burden in the process of moving closer to the gender you want to be.
– Contains no estrogen → less likely to hinder moving closer to the gender you want to be
– High reliability in stopping menstruation → with continued use, most people stop having periods
– High contraceptive effect → no pills to forget, and few failures in real life
– No need to take medication every day → the injection is only once every 3 months
– Can be used together with testosterone therapy → however, testosterone itself has no contraceptive effect, so separate contraception is needed
For trans men (AFAB transgender people), Depo-Provera is one option that makes it easier to consider “stopping menstruation” and “contraception” at the same time.
At the same time, whether an injection is the right method for you, and whether you may want to consider pregnancy in the future, are points that differ in priority from person to person.
At Idaten Clinic, we value your wishes at that point in time — “I want to stop my periods,” “I want reliable contraception,” “I just want to talk about it first” — and we can choose a manageable method together with you.
Side Effects and Precautions
Depo-Provera is a contraceptive method that many people can use safely, but there are also changes that can occur depending on your constitution and how long you use it.
– Breakthrough bleeding (a small amount of bleeding may continue)
– The rhythm of periods becomes irregular
– Headache, sluggishness, mood changes
– Changes in body weight
Breakthrough bleeding occurs readily particularly in the first few months of use, but in many cases it settles down over time.
It is known that long-term use of Depo-Provera may cause a temporary decrease in bone density.
For that reason, at Idaten Clinic we do the following:
– regularly review whether use should be continued in the case of long-term continuation
– provide lifestyle guidance (exercise, nutrition, smoking habits, etc.)
– propose and carry out additional tests for those who need them
Together with these measures, we check with you whether it can be used safely.
To protect bone health during Depo-Provera use, the American College of Obstetricians and Gynecologists (ACOG) and others also recommend weight-bearing exercise such as walking and stairs, not smoking and a diet mindful of calcium and vitamin D.
*It is considered that bone density often recovers once use is stopped.
Before/during use of Depo-Provera, please be sure to tell us if any of the following apply to you.
– Before/during use of Depo-Provera, please be sure to tell us if any of the following apply to you.
– You have fractured a bone even from a minor fall or similar
– You have been told you have osteoporosis
– Your body weight is quite low, or you have lost weight suddenly
– You have been using steroid medication for a long period
– You have kidney disease, malabsorption or thyroid disease
– You have continuing lower back or back pain, or feel that you have become shorter
Even if these apply to you, it does not mean that you immediately become unable to use it.
Taking your symptoms and background into account, we can discuss together whether to continue and what other options there are.
Overseas guidelines state that regularly performing bone density testing (X-ray examination) during Depo-Provera use is not mandatory.
On the other hand, checking whether there are any factors affecting bone health is considered important, and at Idaten Clinic we can perform a “bone health check” using a blood test as needed.
Test contents: Ca, ALP, 25(OH)D, P, Cr (2,500 yen, tax included)
*For those using Depo-Provera, we recommend blood sampling once a year.
Prices
At Idaten Clinic, we aim for pricing that is easy to keep up with.
1 time
– Standard price: 9,000 yen (tax included)
– For those purchasing HIV-PrEP, Doxy-PEP or vaginal candida prevention medication at our clinic: 8,000 yen (tax included)
3-Time Set
– Standard price: 25,000 yen (tax included)
– For those purchasing HIV-PrEP, Doxy-PEP or vaginal candida prevention medication at our clinic: 22,000 yen (tax included)
*From the second time onward, no consultation fee is required if you visit within 12 to 15 weeks of the previous visit.
*For those who fall into the high-risk category by our clinic’s criteria for Depo-Provera use, we ask for a consultation once a year.
Frequently Asked Questions
We have gathered the most frequently asked items below, so please take a look.
Does the injection hurt?
It is usually injected into the shoulder (upper arm) muscle. It is about the same as a vaccine injection, and there is usually no strong pain.
From when does the contraceptive effect start?
This differs depending on the timing of the injection. Where necessary, we ask that you use condoms alongside it for the first 7 days. We will explain individually at your visit.
Does it prevent STIs (such as HIV and syphilis)?
Depo-Provera is a method intended for contraception only. Preventing STIs requires the use of condoms, or HIV prevention medication and STI prevention medication.
What if I want to become pregnant in the future?
After stopping the injections, it is common to return to a state where pregnancy is possible in an average of about 7 to 10 months. Please talk to us in advance about "around when you are thinking of pregnancy".
Is it all right if my periods stop?
Absence of menstruation due to Depo-Provera is not a disease and is not a state that is bad for your body. If you have any symptoms that concern you, please consult us at any time.
I am a trans man — is it all right for me to come and talk?
Of course. At our clinic, as Gender Affirmation, we routinely handle consultations that include stopping menstruation and contraception. Please feel free to consult us.
▶ CDC. Contraception: Injectables (Depot medroxyprogesterone acetate [DMPA]) — U.S. SPR (2024)
▶NHS. How and when to have medroxyprogesterone contraceptive injections.
▶WPATH. Standards of Care for the Health of Transgender and Gender Diverse People, Version 8 (SOC8).
▶FSRH. Contraceptive choices and sexual health for transgender and non-binary people (Oct 2017).
<Dr. Daisuke Shiojiri> Director of Personal Health Clinic, Doctor of Medical Science. At the National Center for Global Health and Medicine (Shinjuku Ward, Tokyo) and at Personal Health Clinic, he provides correct, evidence-based knowledge on HIV, PrEP and other topics related to STIs and STI testing, along with care that stays close to patients' hearts. Born in Japan but raised in Kenya, Africa, he also holds a medical license there and carries out medical assistance, educational assistance and other activities locally. He also sees patients at our clinic as a part-time doctor.
