Day 142 baby development and maternal changes

A: This week you don’t yet need to count systematically; feeling the baby move regularly each day with its own active times is enough (mostly after meals and in the quiet at night). Systematic kick counting usually starts at week 28. If you feel the movement clearly drop by more than half one day, seek medical care promptly.

A: Eat small frequent meals, stay sitting for at least 30 minutes after a meal, don’t eat within 2-3 hours before bed, avoid spicy, greasy, overly sweet food and fizzy drinks, and prop up the upper body when sleeping. If symptoms are severe, you can use pregnancy-safe antacids such as calcium carbonate under a doctor’s guidance — don’t self-medicate long term.

A: It can screen for most structural malformations (brain, spine, heart, limbs, internal organs, cleft lip/palate), but cannot detect all abnormalities (such as small heart defects, functional problems, metabolic diseases). The overall detection rate is about 60-80%, depending on the type and the hospital’s level; low risk is not zero risk.

A: No fasting or full bladder needed. Wear loose two-piece clothes to expose the abdomen; the test takes about 30-60 minutes; you can bring a small snack — when the baby doesn’t cooperate, eat something sweet or move around to stimulate movement. If nervous, your partner can accompany you.

A: The three measurements at 21 weeks: BPD (biparietal diameter) about 49.2mm (head width), AC (abdominal circumference) about 161.1mm (nutrition and organ development), and FL (femur length) about 33.8mm (thigh-bone length). If all three lie within the ranges for that gestational age, development is coordinated; a single slight deviation isn’t necessarily abnormal — go by your obstetrician’s overall assessment.

A: For a standard BMI, about 0.4-0.5kg a week in the second trimester, with a cumulative gain of roughly 4-7kg by week 21 being common. Watch the overall trend rather than a single week; discuss with the prenatal doctor if weight is rising too fast or too slowly, and use a pregnancy weight-gain calculator to manage it by BMI.

A: About 60-75% of pregnant women have pregnancy gingivitis; pregnancy hormones make the gums more reactive to dental plaque. Keep up the soft toothbrush plus floss, rinse with warm water and clean after meals; the second trimester is the safe dental window, so you can have a cleaning and gingivitis treatment. If bleeding is heavy or bad breath is obvious, see a dentist.

A: Not yet systematically. This week you can start familiarising yourself with the baby’s active rhythm to prepare for formal counting after week 28. If you feel the movement suddenly drop clearly, seek care any time.

A: Yes. 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 infected with flu are at higher risk of severe illness, and the vaccine protects both mother and baby; the inactivated vaccine is safe at every stage of pregnancy. 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. If pain, bleeding or contractions occur after sex, pause immediately and consult a doctor; follow the doctor’s advice if they advise against it.

A: Practise sleeping on your left side to increase uterine-placental blood flow and improve the baby’s oxygen supply. Use a pregnancy pillow to support the waist, abdomen and legs; you don’t need to stay that way all night — comfort and good sleep matter; avoid prolonged lying on your back and face-down on the belly.

A: Pregnancy hormone slows intestinal movement and the uterus presses on the intestine, so constipation is common. Drink 1.5-2L of water daily, eat more coarse grains, fruit and vegetables for dietary fiber, walk after meals, and toilet on a regular schedule without squatting long. In serious cases consult a doctor for a pregnancy-safe laxative rather than buying a stimulant laxative yourself.

A: Avoid raw or undercooked meat, fish and eggs (toxoplasma, listeria), high-mercury large fish (shark, swordfish etc.), unpasteurised dairy, alcohol (no amount is safe), caffeine over 200mg a day, and excess animal liver (vitamin A excess). Fully cooked, well-heated food is safer.

A: The second trimester is a better window for flying; most airlines don’t require a doctor’s certificate before 32 weeks and need one after 32 weeks (most prohibit flying after 36 weeks). Choose an aisle seat for movement, stay hydrated, and wear compression stockings to prevent clots. If you have bleeding, pain or placenta problems, ask your doctor first before travelling.

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: Higher oestrogen increases white discharge; milky-white or clear and odourless is normal. Watch out for turning yellow-green, foul-smelling, with vulvar itching or burning (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 oedema after long standing or sitting is common; raising your legs, lying on your left side and walking to promote return flow can ease it. If the swelling spreads from the ankle up the calf and won’t ease with rest, or comes with headache or vision changes, have your blood pressure checked to rule out preeclampsia.