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Obesity Complications in Pregnancy

Maternal and fetal risks of pregnancy in obese patients

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Kadın Hastalıkları ve Doğum department. Book Appointment →

What is Obesity Complications in Pregnancy?

Maternal obesity affects more than 25 percent of pregnancies in many high-income countries.

BMI categories: 30–34.9 (class I), 35–39.9 (class II), ≥40 (class III, morbid obesity).

Risks scale with BMI and are most pronounced in class III obesity.

Mechanisms include chronic inflammation, insulin resistance, altered placental function and lipotoxicity affecting both mother and fetus.

Optimal preconception weight loss (5–10 percent body weight) significantly reduces obstetric risks.

Symptoms

Increased risk of gestational diabetes (3–4 fold)
Higher rates of preeclampsia and gestational hypertension
Difficulty with prenatal ultrasound visualization, particularly fetal anatomic survey
Increased likelihood of induction of labor and cesarean delivery
Greater rates of shoulder dystocia and operative vaginal delivery
Higher likelihood of postpartum hemorrhage, infection, wound complications, venous thromboembolism
Fetal complications: macrosomia, neural tube defects, congenital heart disease, stillbirth

Risk Factors

Pre-pregnancy BMI ≥30 (risk increases progressively with higher BMI)
Excessive gestational weight gain beyond IOM recommendations
Pre-existing diabetes, hypertension, sleep apnea, polycystic ovary syndrome
Family history of obesity-related obstetric complications
Older maternal age, multiparity, sedentary lifestyle
Socioeconomic factors limiting access to preconception care and nutrition

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Preconception consultation when BMI ≥30
  • Confirmed pregnancy with obesity for early antenatal care planning
  • Symptoms of preeclampsia: severe headache, vision changes, epigastric pain, swelling
  • Symptoms of gestational diabetes: excessive thirst, frequent urination, fatigue (or routine GTT screening)
  • Decreased fetal movements after 28 weeks
  • Calf swelling, leg pain, chest discomfort or shortness of breath (VTE concern)

Treatment Methods

01
Preconception counseling on weight loss, supplementation (folic acid 5 mg/day), management of comorbidities
02
Early dating ultrasound, anatomic survey timing optimized (often deferred to 20–22 weeks for visualization), repeat fetal echo if needed
03
Early oral glucose tolerance test (often at first prenatal visit) and repeat at 24–28 weeks
04
Aspirin 100–150 mg daily from 12 weeks for preeclampsia prevention if additional risk factors present
05
Weight gain guidance per IOM: 5–9 kg total in obese pregnancies; nutritional and physical activity counseling
06
VTE risk assessment and prophylactic anticoagulation when indicated; intermittent pneumatic compression peripartum
07
Anesthesia consultation in third trimester for class III obesity; planned delivery at appropriately resourced facility

Which Department to Visit?

You can visit our Kadın Hastalıkları ve Doğum department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.