Obesity in Pregnancy: Risks for Mother and Child, Ways to Reduce Them

In the modern world, the problem of obesity is becoming increasingly relevant, affecting women of reproductive age as well. The growing prevalence of overweight and obesity among expectant mothers is causing serious concern, as this condition significantly increases health risks for both the woman herself and her child [5, 7]. Understanding these risks and timely weight management before, during, and after pregnancy are key factors in ensuring a favorable outcome.

Maternal Health Risks

Being overweight or obese before or during pregnancy is associated with a range of serious complications for maternal health. Studies show that the higher the pre-pregnancy BMI category, the greater the likelihood of developing adverse conditions [2].

• Gestational Diabetes Mellitus (GDM): This is one of the most common complications. A high pre-pregnancy BMI significantly increases the risk of developing GDM, which is confirmed by numerous studies [2, 3, 8].
• Gestational Hypertensive Disorders (GHD): These include gestational hypertension and preeclampsia. Overweight and obese women have an increased risk of developing these conditions, which can lead to serious consequences for the mother and fetus [2, 3].
• Postpartum Hemorrhage (PPH): Obesity is an independent risk factor for PPH, a leading cause of maternal morbidity and mortality. A study conducted among nulliparous women showed that overweight and obesity significantly increase the likelihood of PPH (both ≥500 ml and ≥1000 ml) compared to women with a normal BMI [2, 6].
• Retained Placenta: This is a complication where the placenta does not deliver completely after childbirth, which can lead to bleeding and infections. An analysis of data from millions of births showed that obesity, and especially morbid obesity, significantly increases the risk of retained placenta [4].
• Other Complications: High BMI is also associated with elevated levels of glycated hemoglobin (HbA1c) and may affect the need for neonatal intensive care unit (NICU) admission for the infant, which is a stressful factor for the mother [2].

Child Health Risks

The impact of maternal obesity also extends to the child's health, starting from intrauterine development and continuing into infancy and even later in life. These risks can be both short-term and long-term.

• Macrosomia: Babies born to mothers with a high BMI are more likely to have a high birth weight (macrosomia). This can lead to complications during delivery, such as shoulder dystocia [2].
• Neonatal Intensive Care Unit (NICU) Admission: Studies show that high maternal pre-pregnancy BMI is associated with an increased risk of neonatal admission to the NICU [2].
• Infant and Childhood Obesity: One of the most alarming consequences is the increased risk of obesity in the child. A study revealed a direct link between high maternal pre-pregnancy BMI and infant obesity at 6 months of age [2]. Furthermore, maternal obesity and/or gestational diabetes during pregnancy promote the development of obesity and metabolic disorders in offspring, pointing to the intergenerational transmission of obesity and metabolic problems [8]. This highlights the long-term consequences for the child's health.
• Other Factors: It is important to note that while some factors, such as maternal thyroid disease during pregnancy, did not show a direct association with the development of obesity in the child at 7 years of age, maternal pre-pregnancy BMI remains a key factor influencing the child's weight [1].

The Importance of Weight Management: Before, During, and After Pregnancy

Comprehensive weight management is the cornerstone for minimizing the risks associated with obesity in pregnancy. This process should cover all stages of a woman's reproductive life [5, 7].

• Before Conception (Preconception Period): Optimizing weight before pregnancy is the ideal scenario. Achieving a healthy BMI before conception can significantly improve pregnancy outcomes and reduce the risks of complications for mother and child [5].
• During Pregnancy: Controlling weight gain during pregnancy is crucial. For each woman, depending on her pre-pregnancy BMI, there are individual recommendations for optimal weight gain. For example, for women with a multiple pregnancy (twins), there are specific recommended weight gain ranges that differ from singleton recommendations and should be tailored to their pre-pregnancy BMI [3]. General recommendations for a healthy diet and moderate physical activity help maintain an optimal weight [7].
• After Childbirth: Weight control efforts should not stop after delivery. Maintaining a healthy weight in the postpartum period is important not only for maternal recovery, but also for reducing risks in subsequent pregnancies and for overall long-term health [5].

Special attention is required for women who have undergone bariatric surgery. They need special planning and continuous monitoring during pregnancy to prevent nutritional deficiencies and surgical complications that could threaten the mother or affect fetal development [5].

How to Reduce Risks: Practical Steps

Reducing the risks associated with obesity in pregnancy requires a conscious approach and the active participation of the woman in cooperation with medical specialists.

• Preconception Consultation with a Doctor: If you are planning a pregnancy and are overweight or obese, be sure to discuss this with your doctor. They will help develop an individual plan for weight loss and pregnancy preparation.
• Individual Nutrition Plan: Cooperating with a dietician or nutritionist will help create a balanced diet that provides essential nutrients without excessive weight gain.
• Regular Physical Activity: Moderate, but regular physical exercise approved by a doctor helps maintain a healthy weight and improves overall health.
• Weight Monitoring: Regular weighing and tracking weight gain in accordance with doctor recommendations will help adjust lifestyle in a timely manner.
• Screening and Management of Complications: It is important to undergo all recommended screenings for gestational diabetes and hypertensive disorders to timely detect and manage any emerging complications.

Pregnancy is a unique period in a woman's life, and taking care of one's health during this time is of paramount importance. Weight management before, during, and after pregnancy is a powerful tool to ensure the health and well-being of both the mother and her child.

Sources

1. Maternal thyroid disease and maternal and child obesity. PubMed
2. Association of maternal pre-pregnancy body mass index with pregnancy complications and infant obesity at 6 months of corrected age: a two-center retrospective cohort study. PubMed
3. Establishing population-specific gestational weight gain ranges for twin pregnancies and comparing their effectiveness with IOM recommendations: a retrospective cohort study from central China. PubMed
4. Association between body mass index and retained placenta in delivery hospitalizations: an analysis of Nationwide Inpatient Sample data, 2016-2020. PubMed
5. Management of obesity in women of reproductive age. PubMed
6. Maternal body mass index and risk of postpartum hemorrhage: a population-based study in nulliparous women. PubMed
7. Management of maternal obesity: a health policy literature review. PubMed
8. Association of maternal obesity and gestational diabetes during pregnancy with offspring obesity and dysmetabolism: the Intergenerational Transmission of Obesity (ITO) study. PubMed

Disclaimer: The information in this article is for reference purposes only and should not be used for self-diagnosis or self-treatment. Always consult a qualified medical professional for an accurate diagnosis and an individualized treatment plan.