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Breast Leaking During Pregnancy: Is it Normal?

Updated: Oct 4, 2023

Pregnancy is a journey that brings about numerous changes in a woman's body, including hormonal changes, skin tags, acne, congestion, hair growth, and other physical transformations. The body changes in all sorts of unexpected ways. One common occurrence that pregnant women may experience is breast leaking or discharge. It's a phenomenon we rarely hear about, but it's more common than you think. While it may come as a surprise, having leaky breasts is normal during pregnancy. In this blog, we will explore the reasons behind breast leaking, when does milk start leaking during pregnancy, and what to expect during this period of motherhood.

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Understanding Breast Leaking

Breast leaking, is medically known as lactation or colostrum leaking.

The signs milk is coming in during pregnancy are when there is a yellowish or whitish fluid discharge from the nipples called colostrum. Women often wonder when do you start leaking colostrum? Colostrum is the precursor to breast milk and is packed with vital nutrients and antibodies that support a newborn's immune system. While it may seem unusual to experience breast leakage during pregnancy, it is a positive sign that your body is preparing itself for breastfeeding.

What is colostrum?

Breast / Nipple milk leaking during pregnancy

Breast leaking during pregnancy is basically colostrum. Colostrum is a sticky, yellowish-orangish substance that serves as the first milk a baby will drink soon after birth. Despite its small quantity, colostrum is packed with essential nutrients and immune-boosting properties for the newborn.Colostrum differs from mature milk, which babies will feed on a few days after birth. Here are a few distinctive features of colostrum:

1. Protein content: Colostrum is higher in protein and lower in fat and carbohydrates than mature milk.

2. Infection protection: Colostrum contains increased amounts of secretory IgA, which helps shield your baby from infections.

3. Gut health support: Colostrum protects your baby's gut and establishes a healthy microbiome.

During colostrum production, pregnant women may not experience fullness in their breasts. This is entirely normal. Your baby will receive all the necessary nourishment as long as you breastfeed frequently (around 8 to 12 times daily).

Around 3 to 5 days after giving birth, you may notice that your breasts feel fuller. This indicates that your body is transitioning to producing more mature milk, which will be whiter in color and more abundant.

Remember, the production of colostrum and the subsequent transition to mature milk are natural processes, ensuring that your baby receives the optimal nutrition and protection for their growth and development.

When do you start leaking colostrum?

Breast leaking can happen at various stages of pregnancy, but it is more commonly observed in the second and third trimesters. It is important to note that not all pregnant women will experience breast leaking. Therefore, should such a condition arise, it does not indicate any problems with milk production after childbirth. Also, the timing and intensity of breast leakage can vary from woman to woman.

Causes of Breast Leaking

1. Hormonal Changes: Pregnancy triggers significant hormonal changes in a woman's body, particularly an increase in the levels of prolactin and oxytocin. Prolactin stimulates milk production, while oxytocin is responsible for milk letdown. These hormonal shifts can lead to breast leaking.

2. Breast Tissue Expansion: As pregnancy progresses, breast tissue expands in preparation for breastfeeding. The expansion and growth of mammary glands can cause increased blood flow and colostrum production, leading to leaky breasts.

3. Stimulation: Any form of breast or nipple stimulation, such as sexual activity, frequent touching, or even tight clothing, can trigger breast leakage due to the release of oxytocin.

How to manage Breast Leaking?

1. Breast Pads: To prevent any embarrassing situations caused by breast leakage, consider wearing breast or nursing pads inside your bra. These absorbent pads will help soak up any leaking colostrum and keep you dry and comfortable.

2. Nursing Bras: Invest in well-fitting nursing bras that provide ample support and accommodate any changes in breast size during pregnancy. Nursing bras with removable pads can offer extra protection against leaky breasts.

3. Communication with Healthcare Provider: If you experience excessive or sudden changes in breast leakage or have concerns about your milk production, it is crucial to discuss them with your healthcare provider. They can provide guidance, address potential issues, and offer recommendations for managing breast leakage.

Is leaking milk an early sign of labor during pregnancy?

Women often wonder if breast leaking during pregnancy is indicative of approaching labor. This only holds true if breast leakage occurs in the third trimester, suggesting the body is preparing to feed the baby. However, it is essential to note that it is not a definite sign of labor.

That being said, breast leaking alone should not be considered as a reliable predictor of impending labor. It is just one of the many changes a woman's body goes through during the later stages of pregnancy. The delivery timing is determined by a complex interplay of various factors, including hormonal shifts, cervical changes, and uterine contractions.

Every pregnancy is unique, and each woman's body follows its timeline no matter which month breast milk starts during pregnancy. All you need to do is to trust the process and the guidance of your healthcare provider to navigate you through this exciting journey.

When to Seek Medical Care for Breast Leaking During Pregnancy?

It is normal to experience Bre ast milk leakage during pregnancy, typically characterized by yellow, orange, or whitish milk. It may happen spontaneously or when pressure is applied to the areola area.

Stains or dried flakes on clothing or inside the bra and flakes on the nipples themselves are familiar sights during this time. These are expected and are a part of the changes during pregnancy.

However, reaching out to your healthcare professional is crucial if you see specific signs in milk that are coming in during pregnancy. If you see blood leaking from your breasts or staining your clothes, it is vital to alert your doctor.

There have been rare cases of breast cancer being detected during pregnancy, as per the research conducted in 2020. According to the American College of Obstetricians and Gynecologists (ACOG), potential symptoms may include warmth, reddening, and dimpling of the breast skin, blistering or ulcers on the breast skin, ongoing crusting or scaling of the nipple skin (different from crusted milk, which can be cleaned off), and changes in nipple shape.

There's no need to be alarmed rather, it is a great plus point to stay informed about all the medical possibilities when it comes to your health and the health of your baby. Needless to say, most breast changes experienced during pregnancy, such as increased size, tenderness, darkening of the areolas, and leaky breasts, are expected and not a cause for alarm.

Can breast leaking during pregnancy affect the quantity or quality of breast milk after childbirth?

Breast leaking during pregnancy, specifically colostrum leaking, does not necessarily affect the quantity or quality of breast milk women produce after childbirth. The amount of milk produced and its nutritional composition is ruled by the demand and supply relationship established through breastfeeding. After giving birth, a woman's body continues to undergo further hormonal changes, stimulating mature breast milk production.

Is it possible to stop or prevent breast leaking during pregnancy?

Ideally, it is not recommended to stop or prevent breast leaking during pregnancy, as it is a natural and much-needed process for preparing your body for breastfeeding. However, women may find breast leaking uncomfortable or inconvenient, which can be managed by using breast or nursing pads to absorb the leakage. It is essential to avoid excessive stimulation of the breasts or nipples, as this may trigger further leakage. Furthermore, it is best to consult your healthcare provider for personalized advice for any concerns about excessive leakage or related issues.


Now that we know that breast leaking during pregnancy is normal, it should not cause undue concern. It is a natural part of the body's preparation for breastfeeding. Understanding the causes and managing leaky breasts can help alleviate anxiety or discomfort associated with this phenomenon. Should there be any alarming signs related to the leakage, or if you have any concerns or questions about breast leakage or breastfeeding, consult your healthcare provider for personalized guidance and support. Embrace this journey and the remarkable changes happening within your body as you prepare for the beautiful gift of motherhood.

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About The Author: Dr. Ujwala Patil (MBBS DGO, LCCE )

Dr. Ujwala Patil experienced gynecologist and obstetrician

Dr. Ujwala Patil, founder of Polaris Health Care, specializes in gynecology and obstetrics. With extensive experience and training, she offers expert advice, especially in infertility, cervical cytology, and colonoscopy. Empaneled at Surya and Life point hospitals, she has successfully managed high-risk obstetric cases and conducted over 1000 deliveries, providing compassionate care for women from diverse backgrounds.

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