Day 135 of 280, second trimester
You are 19 weeks and 2 days
Floating comfortably in her fluid-filled sac, your baby is made up almost entirely of water.
145 days until your due date
Because water can pass through the skin and your baby is floating in amniotic fluid, her water content is very high, nearly 90 percent. As her skin thickens and becomes less permeable, and her kidneys get better at controlling water loss in urine, this will fall to 70 percent at birth and about 60 percent by age 10 as kidney function keeps improving.
Fluid carries sound waves, but the inner ear is still immature, and it will be three weeks before a startle response to sound can be reliably seen on a scan. As the uterine wall and eardrums thin, she'll gradually respond to higher and quieter sounds.
Focus on
Your baby: Low-lying placenta
Placenta previa is when the placenta partly (minor) or completely (major) covers the cervix. With major placenta previa, the baby can't be born vaginally, and there's a high risk of heavy bleeding late in pregnancy or during labor, which is treated as an emergency.
If a low-lying placenta is found at your 20-week scan, you may be offered another scan at about 34 weeks, because the placenta may "move up" as the uterus grows and no longer be low by then. With major placenta previa, you may be admitted to hospital for bed rest late in pregnancy.
As a matter of fact
A clean baby
Pregnant women used to believe that not drinking enough water would make the baby dirty!
It's important to stay hydrated, but what you drink doesn't affect the amniotic fluid.
Appointments and key dates around now
- 20-week screening scanBetween 18 and 21 weeks
Read the full 19 weeks pregnant guide
This is general information based on NHS guidance, not medical advice, and every pregnancy is different. Talk to your midwife or GP about anything that worries you. If your baby's movements slow down or change, or you have bleeding, severe pain or leaking fluid, call your maternity unit straight away. In an emergency, call 999.