I haven’t gotten my period in months because of the shot. Can I still get pregnant?

Yes, you can still get pregnant even if you haven’t had a period for months due to the birth control shot. The absence of menstruation (amenorrhea) while using the Depo‑Provera does not automatically mean you are infertile. It usually means the hormone in the shot is preventing ovulation. However, pregnancy is still possible under certain circumstances.

The Depo shot (also called the Depo-Provera injection) contains the hormone progestin (medroxyprogesterone acetate), which works by:

• Stopping ovulation (preventing your ovaries from releasing an egg)
  
  
• Thickening cervical mucus to block sperm
  
  
• Thinning the uterine lining
  
  

When taken on schedule every 12–13 weeks, it is over 99% effective at preventing pregnancy. But missed or delayed injections can reduce its effectiveness.

Why You May Not Have a Period on the Shot

Many women experience irregular periods, light spotting, or no period at all while on hormonal birth control injections. This is called amenorrhea, and it’s a common side effect of the birth control shot.

In fact, after about a year of consistent use, many users stop having menstrual bleeding completely. This happens because:

• The uterine lining becomes very thin
  
  
• Ovulation is suppressed
  
  
• Hormone levels remain steady
  
  

Not having a period while on Depo-Provera is normal and not harmful.

When Pregnancy Is Possible on the Shot

Even without a period, pregnancy can occur if:

1. You Missed or Delayed Your Injection
   If you go longer than 13–15 weeks between shots, ovulation can return. Once ovulation resumes, you can become pregnant—even before your period comes back.
2. You Recently Stopped the Shot
   Fertility does not return immediately for everyone. Ovulation may take several months to restart, but pregnancy can happen before your first post-shot period.
3. The Shot Was Not Given at the Correct Time
   If your first injection wasn’t administered during the first 5–7 days of your menstrual cycle and you had unprotected sex, pregnancy risk increases.

Signs of Pregnancy While on Depo-Provera

Because you may not have a monthly period to signal pregnancy, watch for early pregnancy symptoms such as:

• Nausea or vomiting
  
  
• Breast tenderness
  
  
• Fatigue
  
  
• Frequent urination
  
  
• Abdominal bloating
  
  

If you experience these symptoms or had unprotected sex and are unsure about your shot timing, take a home pregnancy test or consult your healthcare provider.

How Effective Is the Depo Shot?

With perfect use (getting injections every 12 weeks on time), the Depo shot is over 99% effective. With typical use, it is about 94% effective due to late or missed injections.

To maximize birth control effectiveness:

• Schedule your next injection before leaving your appointment
  
  
• Set calendar reminders
  
  
• Use backup contraception (like condoms) if your shot is late
  
  

When to See a Healthcare Provider

You should talk to a doctor or OB-GYN if:

• Your shot is overdue
  
  
• You suspect pregnancy
  
  
• You experience severe abdominal pain
  
  
• You want to switch birth control methods
  
  
• You are planning pregnancy and want to understand your fertility timeline
  
  

Your provider may perform:

• A urine or blood pregnancy test
  
  
• Hormone evaluation
  
  
• Review of your contraceptive schedule
  
  

Not having a period for months because of the birth control shot is common and usually means the medication is working. However, you can still get pregnant if injections are delayed, missed, or recently stopped. If there is any doubt, take a pregnancy test and speak with your healthcare provider.

If you have questions about Depo-Provera, missed shots, irregular periods, or pregnancy risk, schedule a consultation with your medical provider to ensure you stay protected and informed about your reproductive health.