19 weeks pregnant
At 19 weeks you are in the second trimester, and your baby measures about 15 cm from crown to rump and weighs about 240 g, roughly the length of a mango. The morphology scan is usually done this week or next, and from now sleeping on your side is recommended.
Weighs about 240 g, like a block of butter. Averages from standard growth tables; your scan gives your baby's own numbers.
Your baby at 19 weeks
Vernix, a protective coating, forms on the skin. The body is catching up with the head, the face looks human and movements are becoming coordinated.
How you might feel
Round-ligament pains and backache are common, the bump is clearly showing and the skin can feel itchy as it stretches.
Round-ligament pains and backache are common. Sleep on your side from now.
Call your maternity unit or GP today for bleeding, severe pain, or if you cannot keep fluids down. 13 HEALTH (13 43 25 84) in Queensland; 000 in an emergency.
What's due this week in Australia
Tell your employer (when you are ready)
There is no legal deadline to tell your employer, but protections start once they know: transfer to a safe job, no-safe-job leave and special maternity leave.
Morphology (anatomy) ultrasound
A detailed 30–60 minute scan of the baby’s organs, spine, heart and limbs, the placenta position and the cervix.
Coming up: Whooping cough (pertussis) vaccine
Free under the National Immunisation Program in every pregnancy.
Coming up: 20-week antenatal visit
Review of the morphology scan, blood pressure, the first fundal-height measurement and a chat about the baby’s movements.
Checklist for the week
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Questions about 19 weeks
How many months is 19 weeks pregnant?
About four and a half months.
What trimester is 19 weeks?
Week 19 is in the second trimester. In the Australian guidelines Hello Bub follows, the first trimester runs to 13 weeks, the second from 14 to 27 and the third from 28 weeks.
Why sleep on my side from now?
From about 20 weeks, lying flat on your back for long periods can reduce blood flow to the baby, so settling to sleep on either side is recommended for the second half of pregnancy. Waking up on your back is not a cause for alarm; just roll over.
Written by the Hello Bub team; medical schedule follows the Australian Pregnancy Care Guidelines; last reviewed 3 November 2026.