Irregular Periods After Stopping Breastfeeding: Discover Causes & Practical Tips

irregular periods after stopping breastfeeding
Photo by Polina Zimmerman,

Key Points

  • The article explains that the postpartum period brings significant changes to a woman’s body which cause the irregular periods after stopping breastfeeding.
  • After pregnancy and childbirth, breastfeeding initiates a complex hormonal process. When weaning starts, menstrual cycles resume, but irregular periods often occur.
  • Prolactin suppresses ovulation during breastfeeding. After stopping, prolactin levels decline, leading to hormonal readjustment.
  • Common irregularities include delayed, frequent, or varying periods. Factors like weaning patterns, breastfeeding duration influence cycle regularity.
  • Stress, diet, and conditions like PCOS, thyroid disorders, endometriosis, and fibroids can also affect periods.

The postpartum period brings significant changes to a woman’s body. After the experience of pregnancy and childbirth, breastfeeding begins, setting off a complex hormonal process. When you start weaning your baby and reduce milk production, your menstrual cycle begins to return. However, this return to normalcy might not be as smooth as you’d expect. Irregular periods after stopping breastfeeding are common, leaving many women confused and concerned. Let’s explore the reasons behind these irregularities, ways to manage them, and when to seek medical advice.

How Breastfeeding Affects Your Menstrual Cycle

During breastfeeding, the hormone prolactin plays a starring role. Prolactin is responsible for milk production, and its surge suppresses ovulation, the release of an egg from the ovary. This natural birth control method is why many women experience amenorrhea, the absence of periods, while breastfeeding.

Once you stop breastfeeding, prolactin levels gradually decline. This decline paves the way for your menstrual cycle to restart. However, it can take some time for your hormones to return to their pre-pregnancy state. This hormonal readjustment period is the culprit behind irregular periods after stopping breastfeeding.

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Common Irregularities in Your Cycle

Your period may exhibit several irregularities after you stop breastfeeding:

Delayed Periods: It can take weeks or even months for your period to return after you stop breastfeeding. This delay is entirely normal, especially if you breastfed for an extended period.

Frequent Periods: On the other hand, you might experience more frequent periods than your usual cycle. This can be due to fluctuating hormone levels as your body settles into a new rhythm.

Shorter or Longer Cycles: The length of your menstrual cycle might also change. Your periods could become shorter or longer than your pre-pregnancy cycle.

Heavier or Lighter Bleeding: The flow of your period might also vary. You might experience heavier or lighter bleeding than usual during this time.

Spotting: Some women experience irregular spotting or bleeding in between periods after stopping breastfeeding.

It’s important to remember that every woman’s body is unique, and the pattern of your irregular periods can vary. However, if you experience any of these variations for an extended period, it’s best to consult your doctor.

Symptoms of Irregular Periods After Breastfeeding

Irregular periods can manifest in various ways. Here are some common symptoms you might experience:

1. Changes in Cycle Length

Your menstrual cycle may become shorter or longer than usual. Some women experience cycles shorter than 21 days, while others have cycles longer than 35 days.

2. Variations in Flow

The amount of menstrual flow can vary significantly. You might have heavier or lighter periods than before. Spotting between periods is also common.

3. Menstrual Cramps

Changes in hormone levels can lead to more intense or less severe menstrual cramps. You might notice a difference in the type and severity of pain during your periods.

4. Mood Swings

Hormonal fluctuations can affect your mood, causing irritability, anxiety, or depression. These emotional changes often accompany irregular periods.

5. Breast Tenderness

Breast tenderness and swelling can occur due to hormonal changes in your menstrual cycle. This symptom may be more pronounced than before pregnancy.

Potential Causes of Irregular Periods After Stopping Breastfeeding

Several causes influence how long it takes for your periods to normalize after stopping breastfeeding:

Fluctuating Hormone Levels: As prolactin levels decrease, estrogen and progesterone, the key players in your menstrual cycle, start to rise again. However, it can take some time for these hormones to reach their pre-pregnancy levels and establish a regular rhythm. This fluctuation can lead to missed periods, short cycles, or prolonged bleeding.

Weaning Patterns: The way you wean your baby can influence the timing of your period’s return. Abrupt weaning might lead to a quicker return of your cycle, while a gradual weaning process might delay it for a longer duration.

Duration of Breastfeeding: The longer you breastfed, the longer it might take for your periods to resume, as prolactin levels need more time to decrease.

Breastfeeding Frequency: More frequent breastfeeding sessions typically delay the return of your period.

Combined Feeding: If you practiced combined feeding (using both formula and breast milk), your period might return sooner than if you exclusively breastfed.

While these factors influence the timeline, most women find their periods return to regularity within six to twelve months after stopping breastfeeding.

Other Factors Affecting the Return of Regular Periods

While hormonal changes are the primary reason for irregular periods after stopping breastfeeding, other factors can also play a role:

Stress: Chronic stress can lead to irregular periods by disrupting your hormonal balance.

Diet and Exercise: Significant changes in diet or exercise can affect your menstrual cycle.

Polycystic Ovary Syndrome (PCOS): PCOS is a hormonal imbalance that can cause irregular periods, excessive androgen levels, and ovarian cysts. If you have symptoms like weight gain, acne, and excessive hair growth alongside irregular periods, it’s essential to consult your doctor for diagnosis and management.

Thyroid Disorders: An underactive or overactive thyroid gland can disrupt your menstrual cycle. Symptoms like fatigue, weight changes, and mood swings might accompany irregular periods if a thyroid issue is present. Your doctor can perform a blood test to check your thyroid function.

Endometriosis: Endometriosis condition involves the tissue that lines your uterus growing outside of the uterus. It can cause irregular periods, pain during menstruation, and pain during intercourse. If you experience pelvic pain along with irregular periods, talking to your doctor is crucial for diagnosis and treatment options.

Uterine Fibroids: Uterine Fibroids are noncancerous growths in the uterus that can cause heavy bleeding, pelvic pain, and irregular periods. While fibroids are usually not cancerous, your doctor can determine the best course of action based on their size and symptoms.

Remember, these are just some possible causes. If you have any concerns about your irregular periods, a thorough discussion with your doctor can help rule out any underlying issues.

When to Seek Medical Help

If you experience any of the following, schedule an appointment with your doctor:

  • Heavy bleeding that lasts longer than seven days.
  • Excessive bleeding that soaks through one or more pads per hour.
  • Cycles with very short intervals (less than 21 days).
  • Bleeding between periods.
  • Absence of your period for more than six months after stopping breastfeeding.
  • Severe pain or cramping during your period.
  • Clotting larger than a quarter.
  • You notice any unusual vaginal discharge or odor.

Your doctor might perform a pelvic exam and recommend tests like blood tests or a pelvic ultrasound to rule out any underlying medical conditions. Early diagnosis and treatment of any underlying conditions can help regulate your cycle and ensure your overall well-being.

How To Manage Irregular Periods After Weaning

Although irregular periods can be frustrating. While you wait for your cycle to regulate, here are some tips to manage irregular periods after weaning:

  1. Keeping a menstrual calendar can help you monitor your cycle’s pattern, even when it’s irregular. This information can be valuable for you and your doctor if you need to discuss any concerns. There are various mobile apps available to help you track your cycle.
  2. Being overweight or underweight can disrupt your hormonal balance and contribute to irregular periods. Aim for a healthy body mass index (BMI) through a balanced diet and regular exercise.
  3. Eating a balanced diet, exercising regularly, and getting enough sleep can all contribute to hormonal balance and potentially regulate your cycle.
  4. Chronic stress can disrupt your hormonal balance and worsen menstrual irregularities. Practice relaxation techniques like yoga, meditation, or deep breathing to manage stress effectively.
  5. Some natural remedies like evening primrose oil or chasteberry are believed to regulate menstrual cycles. However, it’s crucial to consult your doctor before starting any supplements, especially if you have any underlying health conditions.

How Long Does It Take for Cycles to Regulate?

The timeframe for your menstrual cycle to return to regularity after stopping breastfeeding varies depending on several factors, including those mentioned earlier. However, in most cases, your periods should become regular within six to twelve months of weaning.

Remember, this is just an estimate. The best way to track your cycle and understand your individual pattern is to use a period tracking app or simply note down the start and end dates of your periods on a calendar.


Experiencing irregular periods after stopping breastfeeding is a common and often temporary phase as your body transitions back to its pre-pregnancy state. Understanding the causes, symptoms, and management strategies can help you navigate this period with confidence. By maintaining a healthy lifestyle, managing stress, and seeking medical advice when needed, you can support your body’s natural hormonal balance and promote regular menstrual cycles.


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