Finding out you’re pregnant while you’re still breastfeeding can bring up a lot of questions.

Is it safe to keep breastfeeding? Will my milk supply drop? Do I need to wean before the new baby arrives?

For many moms with healthy, uncomplicated pregnancies, breastfeeding can continue during pregnancy. The American Pregnancy Association and La Leche League International both note that breastfeeding during a normal pregnancy is generally considered safe.

That said, pregnancy can change your breastfeeding experience. Your milk supply may decrease, your nipples may become more sensitive, and your older child may start nursing less.

Is It Safe to Breastfeed While Pregnant?

For most people with a healthy, uncomplicated pregnancy, breastfeeding is generally considered safe, according to the American Academy of Pediatrics. They note you have to take into account "your medical history, your older baby’s responses, your own feelings, and your milk supply."

Breastfeeding releases oxytocin, a hormone that can cause mild uterine contractions. According to the American Pregnancy Association, the amount released during breastfeeding in a healthy pregnancy is generally not enough to cause preterm labor.

La Leche League International also notes that there is no evidence linking breastfeeding with miscarriage during a normal pregnancy.

However, talk with your healthcare provider if you have a high-risk pregnancy, are carrying multiples, have been advised to avoid sex during pregnancy, or experience bleeding or uterine pain.

Will My Milk Supply Decrease During Pregnancy?

It can.

A decrease in milk supply is common during pregnancy, often becoming noticeable around the fourth or fifth month. La Leche League International explains that pregnancy hormones can reduce milk production, and pumping or nursing more frequently may not fully increase supply.

If the child you’re breastfeeding is under one year and still relies heavily on breast milk for nutrition, keep an eye on growth and talk with your pediatrician or lactation professional if you’re concerned about supply.

Does Breast Milk Change During Pregnancy?

Yes.

Pregnancy can change both the amount and taste of your milk. Some babies and toddlers don’t seem to notice, while others may begin breastfeeding less often or even wean themselves.

As pregnancy progresses, your milk will eventually transition toward colostrum for the new baby.

Why Does Breastfeeding Hurt More During Pregnancy?

Pregnancy can make your breasts and nipples much more tender.

La Leche League International notes that nipple sensitivity is common during pregnancy. You may find it helpful to shorten feeds, adjust positioning, or ask an older toddler to nurse more gently.

The American Pregnancy Association also lists sore nipples and nausea during let-down as possible challenges of breastfeeding while pregnant.

And it’s okay to create new boundaries if breastfeeding starts to feel uncomfortable.

Do I Need to Wean During Pregnancy?

Not necessarily. 

Some children breastfeed throughout the entire pregnancy. Others gradually nurse less as milk supply and taste change.

You might decide to continue normally, shorten feeds, gradually wean, or continue breastfeeding after the new baby arrives.

There isn’t one right choice for every family. Your pregnancy, your child’s age and needs, and your own comfort all matter.

Will My Older Child Use Up the New Baby’s Colostrum?

No.

La Leche League International explains that your older child will not “use up” the colostrum before your baby arrives. Your body will continue producing it.

After birth, your newborn’s nutritional needs should come first, especially during the early days when they are receiving colostrum.

What Is Tandem Nursing?

If you continue breastfeeding through pregnancy and then breastfeed both your newborn and your older child after birth, that’s called tandem nursing.

Some moms nurse both children at the same time. Others nurse the newborn first and the older child afterward.

Tandem nursing can help an older child maintain comfort and connection during a big transition, but you don’t need to decide during pregnancy whether it’s right for you.

How Can I Prepare for Breastfeeding After the Baby Is Born?

The CDC recommends talking with your healthcare provider about your breastfeeding goals during pregnancy and learning about breastfeeding before delivery.

It also encourages parents to ask their hospital or birth center about breastfeeding support and to plan for skin-to-skin contact and breastfeeding soon after birth.

If you think your older child may still be nursing when the new baby arrives, it can help to talk through your plans with your OB-GYN, midwife or lactation consultant ahead of time.

Frequently Asked Questions

Can breastfeeding while pregnant cause miscarriage?

La Leche League International states that there is no evidence linking breastfeeding with miscarriage during a normal pregnancy.

When does milk supply drop during pregnancy?

Many moms notice a decrease around the fourth or fifth month, although it can happen earlier.

Can pregnancy change the taste of breast milk?

Yes. Pregnancy can change the taste and composition of breast milk, and some children may breastfeed less as a result.

Do you have to stop breastfeeding when you get pregnant?

Not necessarily. Many moms continue breastfeeding during healthy pregnancies.

Can you breastfeed a newborn and toddler at the same time?

Yes. This is called tandem nursing.

So, Can You Breastfeed While Pregnant?

For many moms with healthy, uncomplicated pregnancies, yes.

You may notice changes in milk supply, nipple sensitivity, or how often your child wants to nurse. Some children continue breastfeeding throughout pregnancy, while others gradually wean.

Talk with your healthcare provider about your specific pregnancy, especially if you are considered high-risk, are carrying multiples, or experience bleeding or uterine pain.

Medical note: This article is for general educational purposes and does not replace individualized medical advice from your OB-GYN, midwife, pediatrician or lactation professional. Please speak with a healthcare provider if you have any questions or concerns. 

Sources

• American Pregnancy Association: Breastfeeding While Pregnant — https://americanpregnancy.org/postpartum/breastfeeding-while-pregnant/
• Centers for Disease Control and Prevention (CDC): Pregnant and Considering Breastfeeding? — https://www.cdc.gov/breastfeeding/features/considering-breastfeeding.html
• La Leche League International: Breastfeeding During Pregnancy and Tandem Nursing — https://llli.org/breastfeeding-info/breastfeeding-pregnancy-tandenursing/
• American Academy of Pediatrics & HealthyChildren.org: Nursing During Pregnancy - https://www.healthychildren.org/English/ages-stages/baby/breastfeeding/Pages/Nursing-During-Pregnancy.aspx