Is it safe to breastfeed while pregnant
Last updated: April 1, 2026
Key Facts
- Oxytocin released during breastfeeding causes mild uterine contractions, which rarely pose problems in normal pregnancies
- The body efficiently redirects nutrients to support both milk production and fetal development simultaneously
- Nipple soreness and breast tenderness typically worsen during pregnancy due to hormonal changes
- Women with high-risk pregnancies should consult healthcare providers before continuing breastfeeding
- Most medical organizations, including ACOG, affirm that breastfeeding during pregnancy is safe for healthy pregnancies
Medical Safety of Breastfeeding While Pregnant
Breastfeeding while pregnant is medically safe for the vast majority of women with healthy pregnancies. Healthcare organizations including the American College of Obstetricians and Gynecologists (ACOG) and La Leche League support continued breastfeeding during pregnancy. The primary concern many women have—whether oxytocin from breastfeeding triggers premature labor—is largely unfounded in normal pregnancies with no complications.
How Oxytocin Affects Pregnancy
Breastfeeding stimulates oxytocin release, a hormone that causes mild uterine contractions. These contractions are similar to the practice contractions that naturally occur during pregnancy (Braxton-Hicks contractions). In healthy pregnancies without risk factors, these contractions pose minimal risk. However, women with placental issues, incompetent cervix, previous preterm labor, or other complications should discuss breastfeeding safety with their healthcare provider before continuing.
Nutritional Demands During Pregnancy and Breastfeeding
The body manages the nutritional demands of both pregnancy and lactation efficiently. Pregnancy alone requires approximately 300 additional calories daily, while breastfeeding requires 500 additional calories. Combined, breastfeeding while pregnant requires thoughtful nutrition—approximately 800 additional calories daily on average, though this varies individually. Prenatal vitamins become even more important during this time, particularly for calcium, iron, and folate.
Physical Discomfort and Changes
Many women experience increased breast tenderness, nipple sensitivity, and soreness when breastfeeding during pregnancy. This is due to hormonal changes preparing the body for increased milk production. Some women notice changes in milk taste or supply as pregnancy progresses. These are normal adaptations, though they may sometimes prompt a young child to self-wean if they notice these changes.
When to Consult Your Healthcare Provider
While generally safe, consulting with your obstetrician or midwife is recommended, especially if you have: previous pregnancy complications, placental abnormalities, bleeding during current pregnancy, a history of preterm labor, incompetent cervix, or multiples pregnancy. Your healthcare provider can assess your individual risk factors and provide personalized guidance on continuing breastfeeding safely.
Managing Comfort During Pregnancy and Breastfeeding
To manage discomfort, consider adjusting breastfeeding positions, using nipple shields, adjusting bra fit for pregnancy changes, staying well-hydrated, and getting adequate rest. Some women find that their young nursling self-weans as milk changes occur, while others continue happily. There is no medical benefit to forcing weaning; let your body and child guide the process.
Related Questions
Does breastfeeding while pregnant increase miscarriage risk?
No, research does not show that breastfeeding increases miscarriage risk in normal pregnancies. The mild contractions from oxytocin are not strong enough to cause miscarriage in healthy pregnancies without existing complications.
Is it safe to continue breastfeeding an older child while pregnant?
Yes, nursing a toddler or older child during pregnancy is safe. Some children naturally wean when milk tastes or availability changes, while others continue. Your healthcare provider should be aware if you have risk factors.
What nutritional changes are needed when breastfeeding during pregnancy?
Combined breastfeeding and pregnancy requires approximately 800 extra calories daily. Ensure adequate protein, calcium, iron, and folate intake through prenatal vitamins and whole foods. Consult a nutritionist for personalized recommendations.
Sources
- American College of Obstetricians and Gynecologists Official Site
- La Leche League International Official Site
- Mayo Clinic Health Information Official Site