19 weeks pregnant: symptoms and baby development
A waxy coat protects their skin.
Second trimesterMonth 55 min read
By Solesia, from public clinical guidanceUpdated
If you could see your baby this week, they would look as though someone had dusted them with cream cheese. That is vernix, a white, waxy coating spreading over their skin to protect it from months of soaking in fluid, and some of it will still be there at birth. It is also the last week their length is counted from crown to rump; from here it runs head to heel, and the number jumps. For you, the theme is your joints: a hormone called relaxin is loosening the ligaments of your pelvis and back, so aches low in the back and around the hips are expected.
How big is your baby at 19 weeks
About the size of a mango
6 in long·9.6 oz
Baby development at 19 weeks
At 19 weeks your baby measures about 6.0 inches from crown to rump and weighs around 9.6 ounces, roughly a mango. They are laying down more fat under the skin every day, and the weight is now climbing by an ounce or two a week.
The vernix is the week’s headline. The skin glands are making a greasy, cheese-like coating that mixes with shed skin cells and the fine lanugo hair, and it does the job a barrier cream does: it keeps the skin from waterlogging and cracking in months of amniotic fluid. Some of it is still there at birth, and it is fine to leave it on for a day.
Behind the gums, the buds of the first teeth are formed, and the adult teeth are already lining up behind them, waiting for age six or so. The brain is sorting out the areas for smell, taste, hearing, sight and touch, and if your baby is a girl, the ovaries already hold the eggs they will have for life.
Your body at 19 weeks
Aches in the pelvis, hips and lower back are expected from about now. Relaxin is doing what the name says, softening the ligaments so the pelvis can give at birth, and the joints it loosens have to hold a growing weight in the meantime. Pain at the front of the pelvis, or across the back of it when you turn in bed or climb stairs, is what is called pelvic girdle pain. It is common, it is manageable, and a physical therapist who works with pregnancy can make a real difference.
The everyday version is a nagging lower back after a day on your feet. Keep both feet on the ground when you dress, take stairs one at a time, sit down to put on shoes, and swing your legs out of the car together. Flat shoes, a warm bath and a pillow between your knees in bed all help; so does keeping active, since strong muscles support loose joints.
The bump is changing your center of gravity, and clumsiness is expected, so give yourself more time. Sleep may be harder too, and this is a good week to get used to your side, with a pillow behind your back so you do not roll. If you have not felt your baby move yet, that is common at 19 weeks, especially the first time; the flutters are on their way.
Common pregnancy symptoms at 19 weeks
- Pelvic and hip pain. Relaxin has loosened the joints. Keep your knees together turning in bed; a pregnancy physical therapist helps.
- Backache. Loose ligaments carrying more weight. Flat shoes, sit to dress, and a warm bath.
- Clumsiness. A shifted center of gravity and softer joints. Slow down on stairs.
- Trouble sleeping. The bump, the bladder and a busy mind. Side-lying with a pillow between your knees.
- Leg cramps. Calf muscles that seize at night. Straighten the leg and flex your foot; it eases in seconds.
- Heartburn. A relaxed stomach valve and a uterus pushing up. Small meals, nothing spicy late.
- Darker skin patches. Hormones stirring pigment, worsened by sun. SPF 30 every morning, and a hat.
When to call your provider at 19 weeks
Two things are worth a same-day call at any point in pregnancy: bleeding that is more than spotting, and pain that is severe or does not ease. From the second trimester, add fluid leaking and any change in your baby’s usual pattern of movement. You do not need to be sure something is wrong to call; that is what the number is for.
What to do at 19 weeks
- Anatomy ultrasound. The scan sits between 18 and 22 weeks, and 19 or 20 is when many practices book it. It takes about 45 minutes; a partner or a friend is welcome at nearly every clinic.
- Sleep on your side, in practice. From 28 weeks the advice is to go to sleep on your side. Starting now, with a pillow behind your back, makes it automatic by then.
- Pelvic support. If the pelvis or hips hurt when you walk or turn in bed, ask your provider for a referral to a physical therapist now rather than waiting; early treatment works better.
- Childbirth class. Many classes start in the second trimester so you finish before the last month.
Common questions at 19 weeks
Is it normal to feel no movement at 19 weeks?
Yes, especially in a first pregnancy, where first movements are usually noticed between 18 and 22 weeks. A placenta on the front wall of the uterus can cushion them for longer. The flutters are subtle at first and easiest to catch lying still after a meal.
What is pelvic girdle pain?
Pain at the front of the pelvis, in the groin, or across the lower back and hips, worse when you walk, climb stairs or turn in bed. Relaxin has loosened the pelvic joints and they move unevenly under the growing weight. It is common, it does not harm the baby, and physical therapy, a support belt and small changes to how you move all help.
What is vernix and why does my baby have it?
A white, waxy coating made by the skin glands and mixed with shed cells and fine hair. It protects the skin from months in fluid, the way a barrier cream would, and it may help keep them warm and protect against germs at birth. Some is still there when they are born; leaving it on for a day is fine.
Can I sleep on my back at 19 weeks?
For now, sleep in whatever position is comfortable. From 28 weeks the advice is to fall asleep on your side, because lying flat on your back lets the uterus press on the large vein that returns blood to your heart. Getting used to your side now, with a pillow behind you, makes that easy later.
Written from public clinical guidance, including NHS: Week 19, ACOG: How your baby grows, ACOG: Changes in your body, NHS: Pelvic pain, NHS: Back pain, ACOG: Back pain during pregnancy and NHS: Your baby’s movements. This page is general information, not medical advice, and does not replace your provider.