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Does magnesium sulfate affect baby?

Understanding the Effects of Magnesium Sulfate on Infants
Magnesium sulfate is a medication commonly used in obstetrics, particularly for pregnant women experiencing conditions like preeclampsia. Its administration has significant implications for both maternal and infant health, raising questions about its effects on newborns.
Maternal Use and Infant Outcomes
Research indicates that magnesium sulfate is primarily administered to prevent seizures in mothers with preeclampsia and to provide neuroprotection for premature infants. Studies have shown that short-term infusions (typically lasting 24 hours or less) can significantly reduce the risk of cerebral palsy in babies born prematurely, suggesting a protective effect on the developing brain. This is particularly crucial as premature infants are at a heightened risk for neurological complications.
However, the use of magnesium sulfate is not without risks. Prolonged administration—beyond 5 to 7 days—has been linked to potential adverse effects in neonates, including skeletal issues and electrolyte imbalances such as hypocalcemia and hypermagnesemia. These conditions can lead to complications that necessitate careful monitoring of the infant after birth.
Neonatal Effects and Monitoring
In a systematic review, it was noted that while magnesium sulfate is beneficial, there are instances where infants may experience hypotonia (decreased muscle tone), with about 6% of infants diagnosed with this condition following maternal treatment. This highlights the importance of monitoring infants who have been exposed to magnesium sulfate during pregnancy, especially if the treatment was prolonged.
Despite these concerns, the overall consensus from various studies is that the short-term use of magnesium sulfate does not present clear negative effects on infants. In fact, the benefits of preventing severe maternal complications and protecting the infant’s neurological development often outweigh the risks associated with its use.
Breastfeeding Considerations
For breastfeeding mothers, the impact of magnesium sulfate on breast milk is minimal. Studies indicate that while intravenous magnesium can slightly increase magnesium levels in breast milk, the absorption of magnesium by infants through breastfeeding is poor. Therefore, maternal magnesium therapy is not expected to significantly affect the serum magnesium levels in breastfed infants.
Conclusion
In summary, magnesium sulfate plays a critical role in managing pregnancy complications and protecting infant health, particularly in cases of preeclampsia and premature birth. While there are potential risks associated with prolonged use, the short-term administration of magnesium sulfate is generally considered safe and beneficial for both mothers and their babies. Continuous monitoring and careful management are essential to mitigate any adverse effects, ensuring the best possible outcomes for both mother and child.

When is a premature baby out of danger?

Babies who are born after 34 weeks gestation have the same long-term health outcomes as babies who are delivered at full term (40 weeks). This means that if your baby is born when they are 34 weeks old, they have the same chances of being healthy as any other baby that wasn’t born prematurely.

How does preeclampsia affect the baby?

Preeclampsia may lead to an unplanned preterm birth — delivery before 37 weeks. Also, planned preterm birth is a primary treatment for preeclampsia. A baby born prematurely has increased risk of breathing and feeding difficulties, vision or hearing problems, developmental delays, and cerebral palsy.

Is too much magnesium bad for fetus?

How much magnesium is safe during pregnancy? During pregnancy, the recommended daily dose of magnesium is 350-360 milligrams to avoid pregnancy complications [6]. 500mg is considered too much and could cause magnesium toxicity.

How long does magnesium sulfate delay labor?

The administration of magnesium sulfate in women with preterm labor pain leads to inhibition of uterine contractions and delay in delivery for at least 48 hours. Administration of magnesium sulfate in the intervention group increases this period 2.7 times the same as in the control group.

What does magnesium sulfate do for the baby?

Exactly how magnesium sulfate provides neuroprotection of the fetus is not well understood, but professionals hypothesize that in-utero administration of magnesium sulfate may (6): Stabilize blood pressure and normalize cerebral blood flow. Stabilize neuronal membranes and block excitatory neurotransmitters.

When should I stop taking magnesium sulfate during pregnancy?

The recently updated FDA guidelines now caution that MgSO4 should not be used for more than 7 days to prevent pre-term labor.

Why avoid magnesium sulfate?

Patients with heart block. Patients with myocardial damage. In addition, the FDA and professional organizations offer warnings against use of magnesium sulfate longer than 5 to 7 days because of risk of fetal and neonatal bone demineralization and fractures.

What are the side effects of magnesium sulfate in pregnancy?

The ‘well recognised’ and more commonly reported maternal adverse effects of magnesium sulphate include flushing, increased warmth and sweating due to the peripheral vasodilatory effects of magnesium, and nausea, vomiting, headaches, muscle weakness, blurred vision, and intravenous (IV) or intramuscular (IM) site pain …

What are the signs of magnesium toxicity in the baby?

Neonates with hypermagnesemia whose mothers have received intravenous magnesium sulfate for pregnancy-induced hypertension may present with respiratory impairment, generalized hypotonia, and GI hypomotility mimicking intestinal obstruction.

What does magnesium do to the baby?

Almost every system in your body – and your developing baby’s body – needs magnesium. This mineral plays an important role in nerve and muscle function and helps to maintain normal blood pressure. It also helps your baby build strong teeth and bones.

Natasha Lunn

Tash is an IBCLC and Business Coach helping fellow IBCLCs create fun, profitable businesses that are more than just an expensive hobby. Before becoming an IBCLC and starting her private practice - The Boobala, Tash graduated as an Osteopath in 2008 and has been in Private Practice in South West Sydney. She was also a volunteer Breastfeeding Counsellor and Community Educator with the Australian Breastfeeding Association for 6 years. Through her business, Your Lactation Biz, Tash coaches and creates products to help new and seasoned IBCLCs build businesses that suit their personality and lifestyle.

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