🩸 Men's Health
Gestational Diabetes (Nigeria Guide)
Diabetes first diagnosed in pregnancy — diet, monitoring, and protecting mother and baby
Gestational diabetes mellitus (GDM) is glucose intolerance first detected during pregnancy. It affects 5–14% of pregnancies in Nigeria, though it is significantly underdiagnosed due to inconsistent screening. GDM usually resolves after delivery, but it markedly increases the risk of type 2 diabetes later in life — for both mother and child. It also causes fetal complications including macrosomia (large baby), birth injuries, neonatal hypoglycaemia, and stillbirth if poorly controlled.
Signs and Symptoms
✓ Most women with GDM have NO symptoms — it is detected on screening
✓ Increased thirst (polydipsia) in some
✓ Urinary frequency — though this is also normal in pregnancy
✓ Fatigue — non-specific in pregnancy
✓ Glucosuria detected on urine dipstick at antenatal visit
✓ Large-for-dates uterus or polyhydramnios (excess amniotic fluid) on ultrasound
When to Seek Help
Routine antenatal careAll pregnant women should be screened for GDM at 24–28 weeks with a glucose challenge test or 75g oral glucose tolerance test (OGTT)
Earlier screening (first visit)Women with ≥1 risk factor — screen at first booking visit with fasting glucose, then repeat OGTT at 24–28 weeks if initially normal
UrgentBlood glucose consistently above 7 mmol/L fasting or 11 mmol/L 2 hours post-meal despite dietary changes — insulin initiation needed
SoonBaby measuring large on ultrasound (macrosomia) in a woman with GDM — suggests inadequate glucose control
6 weeks postpartumRepeat OGTT 6–12 weeks after delivery to check for persistent type 2 diabetes
Tests & Diagnosis
🧪 75g oral glucose tolerance test (OGTT)
Gold standard for GDM diagnosis. Fasting glucose taken, then 75g glucose drink, then 1-hour and 2-hour glucose. GDM diagnosed if: fasting ≥5.1 mmol/L, 1-hour ≥10.0 mmol/L, or 2-hour ≥8.5 mmol/L (IADPSG criteria)
🧪 Fasting plasma glucose
Simple screening test — ≥5.1 mmol/L in first trimester on two occasions = GDM
🧪 HbA1c at booking
HbA1c ≥48 mmol/mol (6.5%) at booking = likely pre-existing type 2 diabetes, not GDM — requires different management
🧪 Fetal biometry ultrasound
Abdominal circumference is the best predictor of macrosomia — important for delivery planning
🧪 Self-monitoring of blood glucose (SMBG)
4-point daily glucose profile: fasting, 1 hour after breakfast, 1 hour after lunch, 1 hour after dinner. Targets: fasting <5.3 mmol/L, 1-hour post-meal <7.8 mmol/L
Frequently Asked Questions
Does gestational diabetes mean my baby will have diabetes?
Not immediately — newborns of mothers with GDM may have low blood sugar (hypoglycaemia) in the first hours after birth (from the baby's insulin overshooting). Long-term, children of GDM mothers have higher lifetime risk of obesity and type 2 diabetes — healthy lifestyle reduces this risk significantly.
Will I always have diabetes after this pregnancy?
GDM resolves in most women after delivery. However, 30–50% develop type 2 diabetes within 5–10 years. An OGTT at 6–12 weeks postpartum confirms resolution. Maintaining a healthy weight, eating well, and staying active dramatically reduces the risk of permanent diabetes.
Can I eat rice and Nigerian staples with gestational diabetes?
Yes, in moderation. Small portions of swallow (pounded yam, eba, amala) with lots of vegetables and protein, rather than large portions of carbohydrate alone. Check your blood sugar 1 hour after eating to see how your body responds. Brown rice and whole grain options are better choices. Work with a dietitian for a tailored Nigerian meal plan.
Is insulin safe for my baby?
Insulin does not cross the placenta and is completely safe for the baby. It is the most thoroughly studied diabetes medication in pregnancy with decades of safety data. When diet alone is insufficient, starting insulin promptly protects the baby from the complications of high blood sugar much more than the medication itself.