Late for your Depo shot? Up to 15 weeks after your last one, the CDC says you can get it with no backup. Past 15 weeks, you can get it if your provider is reasonably certain you are not pregnant, then use condoms or skip sex for 7 days.
The drug label draws its line earlier. The Depo-Provera CI label gives the shot "every 3 months (13 weeks)" and says: "If the time interval between injections is greater than 13 weeks, the physician should determine that the patient is not pregnant before administering the drug." Generic 150 mg shots use the same words. The CDC's 2024 contraception guidance says: "The repeat DMPA injection may be administered up to 2 weeks late (15 weeks from the last injection) without requiring additional contraceptive protection." (DMPA, short for depot medroxyprogesterone acetate, is the drug in Depo.)
With daily pills and the ring, late is counted in hours (see missed birth control pills, taking the wrong pill in your pack and NuvaRing fell out). With the shot, it is counted in weeks from the day of your last shot.
This article provides general information about medication management and is not a substitute for professional medical advice. Consult your doctor or pharmacist for advice specific to your medications.
How Many Days Can You Be Late on a Depo Shot?
Late for Depo-Provera or a generic shot? Count the weeks since your last one, then find your row.
| Time since your last shot | Depo-Provera CI label | CDC 2024 guidance |
|---|---|---|
| Up to 13 weeks (day 91) | On schedule | On schedule |
| More than 13, up to 15 weeks (day 105) | Provider should check you are not pregnant first | Get the shot. No backup needed |
| More than 15 weeks | Provider should check you are not pregnant first | Shot if your provider is reasonably certain you are not pregnant, then 7 days of condoms or no sex. Emergency contraception may be considered (not ella) |
On Depo-SubQ Provera 104? Its label uses 14 weeks instead, covered below.
That means 1 day, 3 days, 5 days, or a week past the 13-week mark is inside the CDC's 2 weeks. A month late is past it. If your clinic uses a different number, follow your clinic.
What Is the Depo-Provera Grace Period?
In the CDC's guidance, it is 2 weeks: you have until 15 weeks after your last shot. The label's line stays at 13 weeks.
The CDC's extra two weeks rests on studies of pregnancy and ovulation after a last shot.
A 2009 review looked at 20 studies of Depo and a similar shot, NET-EN. Six tracked pregnancies after the last shot and found "pregnancy rates during the currently recommended 2-week grace period were zero or very low." When ovulation (releasing an egg) came back after a last Depo shot varied widely, with most results between 15 and 49 weeks.
A 2008 study followed 2,290 Depo users in Uganda, Zimbabwe, and Thailand and tested for pregnancy at every shot. Pregnancy rates per 100 women-years (roughly, per 100 women followed for a year) were 0.6 for on-time shots, 0.0 in the 2-week grace group, and 0.4 in the 4-week grace group. The authors called them "low and virtually identical."
So why not 4 weeks? The CDC notes that the World Health Organization moved to 4 weeks based on one study, but the CDC experts did not apply that data to the U.S. "because a large proportion of women in the study were breastfeeding."
What Happens If You Get Your Depo Shot Late?
Within 15 weeks, the CDC says to get the shot, no backup needed. Because the label says 13 weeks, your provider may still check for pregnancy first.
Past 15 weeks, the CDC says you "may have the injection if it is reasonably certain that they are not pregnant." Providers use a checklist. You have no signs of pregnancy, and at least one of these is true:
- Your last normal period started 7 days ago or less.
- You have not had sex since your last normal period started.
- You have used another reliable birth control method correctly every time.
- You gave birth in the last 4 weeks, or had a miscarriage or abortion in the last 7 days.
- You are fully or nearly fully breastfeeding, have no periods, and gave birth less than 6 months ago.
A urine test may be added, but the CDC warns that "pregnancy tests cannot detect a pregnancy resulting from recent sexual intercourse." After a shot given past 15 weeks, the CDC says to use condoms or skip sex for 7 days.
Told to go home and wait for your period? The 2008 study noted that "many providers send late clients home to await menses." The CDC checklist is another route, so ask whether it applies to you. In the meantime, the Depo-SubQ Provera 104 leaflet says to "Use another kind of non-hormonal birth control, such as condoms," until you restart.
Can I Get Pregnant After a Missed Depo Shot?
Yes, and the risk grows the later you are. The Depo-SubQ Provera 104 leaflet says: "The longer you wait, the greater the risk of getting pregnant." Inside the CDC's 2 weeks, the studies above found zero or very few pregnancies. Past that, no one can tell you when your own protection ends, because time to ovulation varied widely in the studies.
Late for Your Depo Shot and Had Sex?
If you are past 15 weeks and had sex without a condom, the CDC says you "may consider the use of emergency contraception (with the exception of UPA) if appropriate." UPA is ulipristal acetate, sold as ella. The ella label explains why: "Progestin-containing contraceptives may impair the ability of ella to delay ovulation." Depo is a progestin-only shot.
The CDC's other options include a copper IUD placed within 5 days of the first act of unprotected sex and a levonorgestrel morning-after pill. The over-the-counter Plan B One-Step label says "as soon as possible within 72 hours (3 days) after unprotected sex." Morning-after pills, per the CDC, should be taken "as soon as possible within 5 days of unprotected sexual intercourse," with slightly higher pregnancy rates for levonorgestrel after day 3. Ask a pharmacist, and if you throw up afterward, see vomiting after a pill.
Signs of Pregnancy After a Missed Depo Shot
On Depo, a missed period tells you little. In the label's studies, "55% of women reported no menstrual bleeding (amenorrhea) after one year of use and 68% of women reported no menstrual bleeding after two years of use." The leaflet adds: "You could miss a period or have a light period and not be pregnant."
A pregnancy test is how you find out, and since a test cannot catch a pregnancy from very recent sex, ask your provider when to test.
If you got your shot and later learned you were pregnant, tell your provider. The label says Depo "should be discontinued during pregnancy," and also: "Epidemiologic studies and meta‑analyses have not found an increased risk of genital or non-genital birth defects (including cardiac anomalies and limb-reduction defects) following exposure to progestins before conception or during early pregnancy."
Both Depo labels also warn of ectopic pregnancy (a pregnancy outside the uterus). The SubQ leaflet says: "If you have severe pain low in your belly, tell your healthcare professional right away."
Late Depo Shot Side Effects
Spotting or a period while you are late? In the CDC's words, "Amenorrhea and spotting or light bleeding are common with DMPA use, and heavy or prolonged bleeding can occur with DMPA use."
After people stop the shot, the label says, their period "will usually, in time, return to its normal cycle." The pregnancy test advice above still applies.
For very heavy or nonstop bleeding, the leaflet says: "Unusually heavy or continuous bleeding is not a usual effect of Depo-Provera CI and if this happens you should see your healthcare professional right away."
Depo-SubQ Provera 104 vs Depo-Provera
Depo-Provera CI (150 mg) goes into a muscle in your buttock or upper arm. Depo-SubQ Provera 104 (104 mg) "is given as a shot just under the skin on your thigh or belly."
The Depo-SubQ Provera 104 label says "every 12 to 14 weeks" and: "If more than 14 weeks elapse between injections, confirm that the patient is not pregnant before the next injection." It also notes that "ovulation has occurred as early as 14 weeks after a single dose of depo-subQ provera 104."
The CDC does not split them. It says "the only difference between these two formulations is the route of administration," so its 13-week schedule and 2-week grace period cover both.
The U.S. label also says Depo-SubQ Provera 104 "is only to be administered by a healthcare professional." The CDC says self-injected DMPA-SC "should be made available as an additional approach." In a 2019 review, three randomized trials found people who injected themselves were 1.27 times as likely to stay on the shot over 12 months. If clinic visits make you late, ask your prescriber about it.
Can You Get Your Depo Shot Early?
Yes. CDC guidance reads: "The repeat DMPA injection may be administered early when necessary" and "No time limits exist for early injections." Traveling near week 13? Ask to come in early.
The SubQ leaflet's advice works for either shot: "When you get your shot, make an appointment for your next shot. Mark it on your calendar." If your last shot was March 1, week 13 lands on May 31 and week 15 on June 14. Other shots run on their own clocks, like Prolia and Abilify Maintena.
How Pillo Helps
Pillo's Appointment Management keeps the date of your next Depo shot, and Provider Management keeps your clinic's details. If you also take daily medicines, Pillo's alarm keeps going until you respond. Pillo is free for unlimited medications, with ads.
FAQ
Is it OK to be 3 days late for a Depo shot?
Three days past the 13-week mark is inside the CDC's 2-week grace period, so no backup is needed under CDC guidance. The Depo-Provera CI label asks your provider to make sure you are not pregnant once it has been more than 13 weeks.
I am a week late for my Depo shot. Am I still protected?
A week late is about 14 weeks since your last shot. That is inside the CDC's 15-week line, which covers both Depo shots. For Depo-SubQ Provera 104, 14 weeks is also the end of the label's 12-to-14-week window. Either way, get the shot as soon as you can.
I missed my Depo shot by a month. What should I do?
Being a month late puts you at about 17 weeks, past the CDC's 2 weeks. Call your clinic now. The CDC says you can still get the shot if your provider is reasonably certain you are not pregnant, then 7 days of condoms or no sex. If you had sex in the past 5 days, ask a pharmacist about emergency contraception other than ella.
Does the Depo shot get weaker right before it is due?
In the 2008 study of 2,290 women, pregnancy rates were about the same for on-time shots (0.6 per 100 women-years) and for the 2-week grace (0.0) and 4-week grace (0.4) groups. The CDC still allows only 2 extra weeks in the U.S., citing breastfeeding in the study behind the WHO's 4 weeks.
How long does Depo last after your last shot?
For birth control, the CDC's line is 15 weeks after your last shot, and the label's is 13. The drug lingers longer: the label says levels drop until they cannot be measured "between 120 to 200 days following injection." Among women in its study who got pregnant after stopping, the median wait was 10 months. Those numbers show how slowly the shot wears off, not extra weeks of protection.
This article is for informational purposes only and does not constitute medical advice. If you are past 15 weeks and had sex, talk to a pharmacist or your clinic today.
