Pregnancy week 20: halfway

The halfway stone

Today you stand exactly in the middle — as many weeks passed as remain. A day to look back: the nausea weeks, the two-line morning, the flickering scan, the first flutter — how much has already happened.

And to look ahead: from here, every week is a weight-gain week for the baby. The story so far was construction; the story ahead is growth — and with it, the load on you. These remaining second-trimester weeks are the most valuable.

On paper too it's a midpoint — the anomaly scan's window centres here, and its report sets the coming months' course.

Your baby this week

The baby measures banana-length — about twenty-five centimetres crown to heel, past three hundred grams. (From this week measurement runs head to heel — until now it was head to rump, which is why the number suddenly jumps.)

Swallowing practice is in earnest — the baby drinks amniotic fluid, tastes it, and the gut rehearses digestion. The first stool — meconium — is accumulating; it becomes that first black-green nappy after birth.

Skin layers are building, fat is accelerating, and behind the milk-teeth buds, the permanent teeth's buds are already forming — preparation that far ahead.

Changes in your body

The uterus's top edge is at the navel now — from here it climbs about a centimetre a week. The fundal-height number will roughly track the week count: twenty centimetres at twenty weeks.

Breathlessness, heartburn and hip pulls are settling in as regulars. They aren't cured; they're managed — and you've learned the management.

Evening ankle swelling may appear after long days on your feet. Feet up in the evening, salt sensible, water full — that's ordinary swelling. Sudden swelling, face-and-hands swelling, or one-sided swelling is the other kind — that's in the warning list.

What to do this week

Get the anomaly report explained line by line — especially placenta position and fluid volume. Photograph the report; paper gets lost, phones don't.

Do the halfway audit: is the weight on the doctor's track? What was the last haemoglobin? Are the IFA and calcium actually going in daily? Carry the three answers to the next visit.

Fix the sugar-test (GTT) date now — the window is 24-28 weeks. It's a fasting test that takes two-three hours; plan that morning's logistics in advance.

Start the name list — the halfway celebration and the household's sweetest argument. Both boy and girl columns; whoever arrives, a name should be waiting.

Week 20 at a glance

The week's essentials in one place. Your doctor may adjust these for your situation.

When to see a doctor at once

The standing list — bleeding, persistent pain, high fever, urinary burning, sudden watery discharge, one-sided calf swelling: same-day.

Memorise the triad from here: severe headache + visual flashes + sudden face-hand swelling. That is pre-eclampsia's warning — the three together mean a BP reading now, not tomorrow morning.

This article is general information only and no substitute for personal medical advice. The person who can advise you knowing your health, your medicines and your previous pregnancies is your obstetrician, or the doctor at your nearest health centre.

Work out your due date

Enter the first day of your last period and your cycle length — your estimated due date, this week's count and the anomaly scan window all appear right here.

It is only an estimate — most babies aren't born on the exact date. A first-trimester scan dates a pregnancy more accurately; in the end, your doctor's date is the one that counts.

Frequently asked questions