When Will My Breast Milk Come In? Stages And Signs

For most new mothers who are starting their breastfeeding journey, wondering “when will my breast milk come in?”  is totally normal. By understanding the timing and signs of mom’s breast milk arrival after giving birth, mothers can significantly feel calm and well prepared when it comes to breastfeeding. Here are all you need to know about the timing and signs that your milk is on way, plus reasons and solutions for delayed onset of lactation.

When will my breast milk come in?

Breast milk comes in three different stages, including colostrum, transitional milk, mature milk — and breast production actually starts before even giving birth, according to Taniqua Miller, M.D., an Atlanta-based OB-GYN 

Stage 1: Colostrum

Colostrum actually is produced at around the second and third trimester of pregnancy which is the first rich of nutrient milk that your body makes. Most mothers are not aware of this stage as it is not easy to leak or express until your baby is born. 

Colostrum is a thick, yellowish color that is highly concentrated and full of necessary nutrients for your baby on their first day of life. Although there are only a few drops of colostrum milk at each of those breastfeeding on the first day, it serves a valuable purpose and gives your beloved baby a large amount of significant nutrients. Colostrum is rich in 2x protein, antibodies, white blood cells; lower in fat and no sugar which are highly suitable for a baby’s small stomach and digestive system. In addition, it has laxative-like properties that help pass meconium and fight jaundice. Therefore, just a tiny amount of colostrum is enough to protect your baby from infections and illnesses, boost your baby’s immune system and provide them with all the nutrition and liquids they need. 

Stage 2: Transitional milk

Changing hormones and baby’s sucking will stimulate increased blood flow to your breasts. This not only boosts milk production but also alters its composition during your baby’s first month. The next stage is called transitional milk and can last up to two weeks postpartum

After giving birth, many new mothers are curious about when their milk will “come in”. This typically refers to the transitional milk  which usually appears around 2-5 days postpartum. Although for as many as 25% of mothers, it may take longer than three days.

Transitional milk is more similar in appearance to whole milk. A famous women’s health expert, Sherry Ross, MD, refers in her book She-ology: The Definitive Guide to Women’s Intimate Health that transitional milk is thinner and whiter with richer protein, fat, and carbohydrates than colostrum¹.

Stage 3: Mature milk 

The final stage in lactation – mature breast milk – arrives after the transitional milk stage. Mature milk starts with foremilk which is thinner and expressed in bluish color. Foremilk looks like skim milk that has lots of nutrients but not much fat. As the breastfeeding goes on, mature milk will gradually change to a thicker and creamier in texture milk known as hindmilk. This mature milk is what your baby will continue to consume until you decide to wean, ensuring they receive all the necessary fats and nutrients throughout their development. 

What signs to expect? 

There are some common signs that show your milk is coming in

• Breast engorgement: One of the most noticeable common signs is an increase in the breasts size and heaviness. Moms will feel your breasts become larger, warmer and heavier. 
• A tingly pins-and-needles sensation during breastfeeding: “Milk comes in” can be a little bit painful and discomfort at your breasts, especially nipples. According to Amanda P. Williams, M.D., MPH “The changes in breast fullness can cause pressure and even pain for some moms, the breasts and nipples can feel warm and sensitive to the touch”. However, you do not need to worry much. This is a completely normal sign. A tingly sensation mainly happens because of the contraction of the milk ducts, making it easier for the milk to come out.
• Longer breastfeedings: you’ll notice that your baby stays at the breast longer. Babies will take larger gulps with clear swallowing sounds. Sometimes, mothers even see milk dribbling from the corner of the baby’s mouth.
• A change in milk texture and appearance: As the milk changes from colostrum to mature milk, your milk will get thinner and more blue-white in color.

Delayed onset of lactation

Typically, breast milk will come in approximately the 2-5 days postpartum. However, in some cases, mother’s milk does not increase as expected. This is known as delayed onset of lactation (DOL). 

Reasons of delayed onset of lactation

Delayed onset of lactation can be due to these reasons below: 

• This is your first baby: Since the body has not previously undergone the process of milk production, mother’s breasts need more extra time to adjust to hormone changes and learn how to make milk efficiently as well. With your second baby, your milk will likely arrive sooner.
• Cesarean delivery: the use of anesthesia, Pitocin, or a lot of IV fluids during a C-section can delay the arrival of your breast milk².
• Losing excessive blood during or after delivery 
• Obesity: if you were overweight before pregnancy or gained too much during pregnancy, it can delay breast milk production³. 
• Diabetes: For mothers with diabetes, milk production may start later due to factors like hormonal imbalances, higher rates of c-sections, premature births, and separation from the baby at birth.
• Thyroid conditions: Thyroid issues, such as hypothyroidism or PCOS, also slow down your ability to produce breast milk⁴.

What do I need to do if my milk is delayed?

First and foremost, moms should ask doctors or other reliable medical professionals for their lactation consultation. They will help you identify any medical issues, such as thyroid, testosterone, prolactin, etc that are causing the delay and develop a strategy to boost your milk production. They’ll also monitor your baby’s progress and conduct weight checks to determine if any additional supplementation is needed.

Another best way to encourage faster milk production is to continue breastfeeding your baby frequently, at least every two to three hours, including overnight. You should also try different methods of expressing milk, such as hand expressing or using a breast pump. Doing this helps maintain the necessary levels of prolactin, a hormone essential for milk production in the mother’s body. Do not forget to check that your baby has a proper latch, as incorrect latching can slow down the stimulation of making milk. 

In addition, make sure to drink plenty of water and get enough rest. Breast milk is 90% water, so increasing your water intake can boost your milk supply. It’s recommended that breastfeeding mothers consume about 3 liters of warm water each day. Also, getting more sleep can help your body make more milk because it relaxes you and helps release the right hormones for milk production.

Additional tips to support milk production:

Stay skin-to-skin with your baby as much as possible. Skin-to-skin contact releases oxytocin and prolactin, hormones essential for milk production and let-down. Try to spend at least an hour daily in this bonding position.

Consider power pumping if you’re exclusively pumping or supplementing. Power pumping mimics cluster feeding by pumping for 10 minutes, resting for 10 minutes, and repeating this cycle for an hour once daily. This technique can signal your body to increase milk supply.

Avoid pacifiers and bottles in the early weeks unless medically necessary. Giving your baby opportunities to practice at the breast, even if milk hasn’t fully come in yet, helps establish your supply and strengthens their sucking reflex. If supplementation is needed, work with a lactation consultant on paced bottle feeding or using a supplemental nursing system at the breast.

Frequently Asked Questions

When will my breast milk come in after delivery?

For most mothers, transitional milk arrives around 2-5 days after giving birth. However, up to 25% of mothers may experience their milk coming in after day three. First-time mothers often see their milk arrive slightly later than mothers who have given birth before. If you had a cesarean delivery, it may take a bit longer due to anesthesia and IV fluids used during surgery.

How often should I breastfeed my newborn?

During the first weeks after birth, breastfeed your newborn on demand, typically every one and a half to three hours. Some babies nurse as often as every 90 minutes, while others stretch to every two to three hours. Watch for hunger cues like rooting, hand-to-mouth movements, or fussiness rather than strictly following a clock. Frequent feeding helps establish your milk supply.

How can I tell if my milk has come in?

You’ll notice several signs: your breasts will feel fuller, heavier, and warmer. You may experience breast engorgement and a tingly pins-and-needles sensation during feeding. Your baby will feed longer with audible swallowing sounds, and you might see milk dribbling from their mouth. The milk will also change from thick, yellow colostrum to thinner, whiter transitional milk.

How can I relieve breast engorgement?

Encourage your baby to nurse frequently, ideally every two to three hours. Before feeding, gently massage your breasts or apply a warm compress to help milk flow and make latching easier. Between feedings, use cold compresses to reduce swelling. If your baby isn’t feeding enough, pump to relieve pressure and maintain milk supply.

What should I do if my milk hasn’t come in after 5 days?

Contact your healthcare provider or a lactation consultant if your milk hasn’t increased by day five postpartum. Continue breastfeeding or pumping every two to three hours to stimulate milk production. Ensure your baby has a proper latch, as incorrect latching can delay milk production. Stay hydrated by drinking about 3 liters of water daily, and get adequate rest to support hormone production.

Conclusion

To sum up, as the baby begins to nurse, the milk transitions through several stages—colostrum, transitional, and finally, mature milk. For most mothers, milk production will increase in quantity and start to change from colostrum to mature milk between days 2 and 5 postpartum with some following signs: breast engorgement, longer feeding times, and changes in milk’s appearance, etc. If you are experiencing delayed onset of lactation, just stay calm and try your best to follow the step by step useful method above.

Last update: 01/23/2026