The third trimester arriving at 28 weeks is less dramatic than it sounds — your body doesn't read a calendar. What does change is your care schedule (appointments every 2 weeks from now), your monitoring habits (kick counting starts), and the type of symptoms you're tracking. If you're waiting on glucose test results, take a breath: a borderline result triggers a follow-up test, not a diagnosis. Most women who fail the 1-hour screening pass the 3-hour test.
The anti-D (RhoGAM) injection is given at 28 weeks if you are Rh negative. It prevents complications in future pregnancies.
What your baby is doing developmentally this week explains why your body is responding the way it is.
REM sleep in the fetus begins around 28 weeks. Researchers believe these early dream states help consolidate the massive amount of sensory information the developing brain is processing.
Pelvic girdle pain (SPD) affects 1 in 5 pregnant women and can be debilitating. It
If you haven't had your gestational diabetes screening yet, it typically happens between weeks 24–28. The standard test (1-hour glucose challenge test) involves drinking a glucose solution and having blood drawn one hour later. No fasting is required for the 1-hour test.
If the 1-hour result is elevated, a 3-hour fasting glucose tolerance test follows. About 15–20% of people who fail the 1-hour test are diagnosed with gestational diabetes on the 3-hour test. Gestational diabetes is manageable — most cases are controlled with diet changes alone.
From 28 weeks, your provider may recommend kick counting (fetal movement counting). The standard guideline: count fetal movements daily and note how long it takes to feel 10 movements.
Normal baseline: 10 movements within 2 hours. Most babies reach 10 movements much faster — 15–30 minutes is common after meals or in the evening.
When to call: If you don't feel 10 movements in 2 hours, drink cold water, lie on your left side, and try again. If still fewer than 10 in 2 more hours, contact your provider or maternity unit. Don't wait until the next day — decreased fetal movement warrants same-day assessment.
Baby's most active times: after you eat, in the evening, and when you lie still. You'll start to recognize your baby's personal movement pattern — changes in that pattern matter more than any specific count.
28-week appointment: blood pressure check, fundal height, iron levels, anti-D injection if Rh negative, GBS discussion.
What should you do right now?
ACT NOW = call provider or go to hospital · MONITOR = watch and note · NORMAL = expected, no action needed
28 weeks marks the start of the third trimester. Pregnancy runs: first trimester (weeks 1–13), second (weeks 14–27), third (weeks 28–40). You have approximately 12 weeks until your due date.
At 28 weeks, your baby is approximately 14.8 inches (37.6 cm) long and weighs about 2.2 lbs (1 kg) — roughly the size of an eggplant. Brain tissue is expanding rapidly, REM sleep cycles have begun, and the baby can open and close their eyes in response to light.
Yes — Braxton Hicks are common from mid-pregnancy and increase in frequency in the third trimester. They are usually painless, irregular, and do not progress. If contractions become regular, painful, occur with lower back pain, or you feel pressure, contact your provider.
Normal at 28 weeks: shortness of breath (uterus pressing on the diaphragm), pelvic girdle pain, Braxton Hicks, backache, increased fetal movement, leg cramps, and disrupted sleep. Seek same-day care for: severe headache with vision changes, sudden facial or hand swelling, decreased fetal movement, or heavy bleeding.
Left-side sleeping is recommended from 28 weeks. The uterus can compress the inferior vena cava when lying flat on the back, reducing blood flow. If you wake up on your back, simply roll to your left. The risk is from sustained back-sleeping — not from briefly ending up there during sleep.
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