Your baby this week
Behind the buds for baby teeth, buds for permanent teeth are now forming. Your baby is putting on weight steadily.
At 19 weeks a creamy white coating called vernix begins to cover your baby's skin and protect it in the amniotic fluid. Areas of the brain for taste, smell, hearing, sight and touch are developing. Sleep and wake cycles are starting to emerge, so you may notice calmer and busier stretches. For you, night-time leg cramps may start: stretching your calves before bed, staying active and drinking enough fluids can help. Mild ankle swelling in the evening is common, but sudden swelling of your face or hands, a bad headache or vision changes can be signs of preeclampsia and need urgent care. If it's flu season, the flu shot is recommended at any point in pregnancy.
By the numbers
Week 19 covers days 133 to 139 counted from the first day of your last period, which is 48% of a 40-week pregnancy. About 147 days remain until a 40-week due date. Since last week, an average baby gains about 1.8 oz (50 g). By date of conception, your baby is about 17 weeks old.
Pregnancy is dated from the first day of your last period, so conception happens around week 2. Your due date is 280 days (40 weeks) from that day, and an early ultrasound may adjust it.
Your body
Leg cramps, often at night, and mild ankle swelling are common. Sudden swelling of your face, hands or feet is different: call your provider right away.
Tests and to-dos this week
If it's flu season, get your flu shot; it's recommended in any trimester. Keep your anatomy scan on the calendar if it hasn't happened yet.
Quad screen (optional) · weeks 15–22 · test
Anatomy ultrasound · weeks 18–22 · test
Coming up: Glucose screening for gestational diabetes (from week 24). Full prenatal visit schedule
Tips for the second trimester
- Most healthy pregnant people are advised to get about 150 minutes of moderate activity a week, such as walking or swimming.
- Your recommended weight gain depends on your pre-pregnancy BMI, and gain usually speeds up in the second trimester.
- Once you feel your baby regularly, learn their usual pattern; a change in pattern matters more than any count.
- The flu shot is recommended at any point in pregnancy during flu season.
Call your provider or labor and delivery right away if you have:
- vaginal bleeding or leaking fluid
- regular contractions or pelvic pressure before 37 weeks
- a severe headache, vision changes, or sudden swelling of the face or hands
- a fever of 100.4 °F (38 °C) or higher, or painful urination
- after 24 weeks, your baby moving less or differently
In an emergency, call 911.
Last week and next week
Next week (20): From this week, length is measured from head to heel, which is why the number jumps.
Frequently asked questions
How big is the baby at 19 weeks?
About the size of a mango: about 5.9 in (15 cm) · 9.6 oz (272 g), measured crown to rump. These are rounded averages, and every baby grows at their own pace.
How many months is 19 weeks pregnant?
19 weeks is in month 5 and the second trimester. About 21 weeks (147 days) remain until a 40-week due date. Months are approximate; providers count weeks and days.
Is foot swelling normal at 19 weeks?
Mild ankle swelling by evening is common and usually harmless. Sudden swelling of the face, hands or feet, especially with a headache or vision changes, needs urgent care.
What's the next test or appointment after week 19?
Next up: Glucose screening for gestational diabetes, from week 24. Your provider may schedule things differently depending on your health and local practice.
Sources
- WHO Fetal Growth Charts (Kiserud et al., PLoS Med 2017)
- INTERGROWTH-21st crown-rump length standard (Papageorghiou et al., 2014)
- Hadlock et al.: In utero fetal weight standard (Radiology 1991)
- NHS: Week-by-week guide to pregnancy
- NHS: Pregnancy symptoms you need to get help for
- ACOG: How Your Fetus Grows During Pregnancy
- ACOG: Routine Tests During Pregnancy
- ACOG: Prenatal Genetic Screening Tests
- CDC: Vaccine Recommendations Before, During, and After Pregnancy
- Office on Women's Health: Prenatal care and tests
- Hungarian Decree 26/2014 (IV. 8.) EMMI on prenatal care
- NNGYK (Hungary): 2026 vaccination methodology letter
- ACOG – Group B Strep and Pregnancy (Committee Opinion 797)
- ACOG – The Rh Factor
Last reviewed: November 14, 2026 · Kitpebble editorial team
This page is for general information. It isn't medical advice or a diagnosis and doesn't replace your OB-GYN or midwife. Sizes are rounded averages. Our editorial policy