Postpartum Uterine Instability: Causes and Solutions - Obstetrics and Gynecology

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Postpartum endometrial instability


Hello, Doctor.
I previously asked you about the issue of postpartum lochia.
After my follow-up visit and transvaginal ultrasound, it was confirmed that my uterus is clean and the lochia has stopped, but there is still some slight bleeding.
My attending physician mentioned that the endometrium is unstable and recommended taking menstrual regulation medication for a week.
However, I have heard that this situation can sometimes occur in breastfeeding individuals and that it may resolve once breastfeeding is stopped.
Is this true? Additionally, does more frequent breastfeeding lead to an increased incidence of endometrial instability and shedding? If so, would reducing the frequency of breastfeeding help improve the situation?

maggie, 30~39 year old female. Ask Date: 2013/04/19

Dr. Liu Yuhong reply Obstetrics and Gynecology


During the first 6 to 9 months of breastfeeding, menstruation typically does not occur; however, there may be irregular, light vaginal bleeding at unpredictable times.
There is no need to stop breastfeeding or reduce the frequency of breastfeeding sessions due to this.

Reply Date: 2013/04/19

More Info


Postpartum uterine instability, particularly in the context of irregular bleeding and endometrial instability, is a concern for many new mothers. Your situation, where you have experienced some bleeding despite being told that your uterus is clean, can be distressing. It is important to understand the underlying causes and potential solutions for this condition.

Firstly, postpartum bleeding, or lochia, is a common occurrence after childbirth, and it can vary in duration and intensity. The presence of irregular bleeding after the initial postpartum period may indicate that the endometrium (the lining of the uterus) is not stabilizing as expected. This can happen for several reasons, including hormonal fluctuations, retained placental tissue, or uterine atony (failure of the uterus to contract effectively).

In breastfeeding mothers, hormonal changes play a significant role in uterine health. Prolactin, the hormone responsible for milk production, can inhibit the secretion of estrogen, which is crucial for the regeneration of the endometrial lining. This hormonal interplay can lead to a state of endometrial instability, where the lining does not mature properly, potentially causing irregular bleeding. It is indeed true that some women experience more pronounced bleeding or irregularities while breastfeeding, and this can sometimes improve when breastfeeding is reduced or stopped.

Regarding your question about the frequency of breastfeeding and its impact on uterine stability, it is possible that more frequent breastfeeding could lead to more pronounced hormonal effects, which might contribute to the instability of the endometrial lining. However, it is essential to note that every woman's body responds differently to hormonal changes, and what might be true for one individual may not apply to another.

If you are considering reducing the frequency of breastfeeding to see if it alleviates your symptoms, it is crucial to approach this decision carefully. Breastfeeding has numerous benefits for both the mother and the baby, and any changes should be made with consideration of these factors. Additionally, it is advisable to consult with your healthcare provider before making any significant changes to your breastfeeding routine. They can provide personalized advice based on your specific situation and health history.

In terms of treatment, your doctor has suggested hormonal therapy to help stabilize the endometrium. This is a common approach and can be effective in regulating menstrual cycles and reducing irregular bleeding. It is essential to follow your doctor's recommendations and monitor your symptoms closely. If the bleeding persists or worsens, further evaluation may be necessary to rule out other underlying issues, such as retained products of conception or other gynecological conditions.

In summary, postpartum uterine instability can be influenced by various factors, including hormonal changes associated with breastfeeding. While reducing breastfeeding frequency may help some women, it is essential to consult with your healthcare provider to determine the best course of action for your specific situation. Regular follow-ups and open communication with your doctor will be key in managing your postpartum recovery effectively.

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