Day 183 baby development and maternal changes

A: This is the last week of the second trimester; next week you enter the third trimester. The baby shows REM sleep and may be "dreaming", the lungs are close to breathing on their own, and the immune system starts receiving antibodies from the mother. For you, prepare for the third trimester: visits change to every two weeks, start counting fetal movements, and get the hospital bag ready.

A: The survival rate of a 27-week preterm baby under NICU care is already fairly high (about 80%-90%, though it varies between hospitals) and the risk of severe disability is clearly lower than for babies born earlier. But it’s still not an ideal delivery time — keeping the pregnancy to term is best for the baby; seek care promptly at preterm-labour signs (regular contractions, broken waters, bleeding).

A: Yes. The growing uterus pushes the diaphragm up, and pregnancy oxygen demand rises, so it’s easy to feel breathless. Slow your movements, sit up straight with the chest out to give your lungs more room, and prop your upper body up a little when sleeping. If breathing difficulty comes on suddenly with chest pain or blue lips, seek care immediately to rule out pulmonary embolism.

A: After entering the third trimester at week 28, visits change from monthly to every two weeks (with more frequent weekly visits after week 36), and you start counting fetal movements daily. The third trimester also arranges the small scan (weeks 30-32), GBS screening (weeks 35-37) and NST fetal-heart monitoring (generally from week 34).

A: The three measurements at 27 weeks: BPD (biparietal diameter) about 67.7mm, AC (abdominal circumference) about 225.8mm, and FL (femur length) about 49.0mm, reflecting head, abdomen and leg development. If the three are in step, growth is good; a single slight deviation isn’t necessarily abnormal — go by your obstetrician’s overall assessment.

A: A cumulative gain of about 8-11kg by week 27 is common. For a standard BMI, the whole pregnancy recommends about 11.5-16kg, with the second and third trimesters at about 0.4-0.5kg a week. Watch the overall trend and manage by BMI with a weight-gain calculator.

A: Nearly. Systematic counting usually starts from week 28: pick one hour in the morning, afternoon and evening each, count fetal movements while lying on your left side or sitting; normally ≥10 times within 2 hours. This week you can first become familiar with the method and your baby’s routine. Seek care any time if movement clearly decreases.

A: They come from a forward centre of gravity and relaxin loosening the ligaments and pelvic joints. Avoid long standing or sitting, wear supportive low-heeled shoes, side-sleep with a pregnancy pillow, use a belly-support belt, do prenatal yoga and pelvic-floor exercise, and apply local warmth. Sharp pain on one side or with bleeding and fever needs care.

A: ACOG advises women without complications about 150 minutes of moderate-intensity exercise accumulated weekly (walking, prenatal yoga, swimming), split over 5 days at about 30 minutes a day. Avoid intense exercise and pressure on the abdomen; stop and seek care for pain or bleeding.

A: It’s recommended. The CDC and ACOG recommend that pregnant women receive the inactivated flu vaccine: pregnant women are at higher risk of severe flu, the vaccine protects mother and baby, and it is safe at every stage. During flu season (September to April) you can get vaccinated; tell them you’re pregnant.

A: If there’s no placenta praevia, bleeding, cervical insufficiency or threatened preterm labour, gentle sex is fine using positions that don’t press on the belly and with gentle movements. Pause if you feel unwell or the doctor advises against it; see a doctor for post-sex bleeding or pain.

A: A growing belly, frequent urination and trouble turning over affect sleep. Use a pregnancy pillow for support, sleep on your left side, soak your feet before bed to relax, reduce evening fluids to cut night urination, and exercise moderately during the day. Avoid screens before bed and caffeinated drinks.

A: When a cramp hits, flex the foot and massage the calf. Prevention: supplement calcium and magnesium, drink water, stretch before bed, wear support stockings, and avoid long standing or sitting. If cramps are frequent with weakness and numbness, check blood calcium, magnesium and electrolytes at a prenatal visit.

A: Avoid raw or undercooked meat, fish and eggs, high-mercury large fish, unpasteurised dairy, alcohol, caffeine over 200mg a day, and excess animal liver. If you have GDM, strictly control refined sugar and sugary drinks as well.

A: Eat more coarse grains and vegetables for dietary fiber, drink 1.5-2L of water daily, walk after meals, and toilet regularly without squatting long; soak in warm water for haemorrhoids. In serious cases consult a doctor about a pregnancy-safe medication; discuss with your doctor if iron worsens constipation.

A: Eat smaller meals more often and chew slowly, sit or stand for 30 minutes after meals before lying down, avoid eating in the 2-3 hours before bed, avoid spicy, greasy, overly sweet food and carbonated drinks, and prop up your upper body when sleeping. In serious cases, use a pregnancy-safe antacid under a doctor’s guidance.

A: Higher oestrogen increases white discharge; milky-white or clear and odourless is normal. Watch for turning yellow-green, foul-smelling, with itching (infection), or a sudden large amount of watery leakage (rupture of membranes) — seek care the moment these appear. Wear cotton underwear and don’t douche.

A: Mild swelling after long standing or sitting is common; raise your legs, lie on your left side, walk to promote return flow, and moderately limit salt. If the swelling suddenly worsens, spreads to the face and hands, or comes with headache or vision changes, check your blood pressure to rule out preeclampsia.