Your baby now measures about 16.5 inches (42 cm) from head to foot and weighs about 4.8 pounds (2.18 kg) at the start of the week—and about 5.2 pounds (2.35 kg) at the end of the week.
Your baby’s immune system is now capable of fighting minor infections.
Day by day the amount of space lessens, and your baby’s movements are become larger and slower.
Your blood volume has now increased by about 1 liter (0.3 gallons) and this volume will remain constant until you give birth. Fluid can accumulate in your body and you’ll notice swelling in your hands and feet, for example. Your rings may no longer fit.
If you notice sudden increased swelling, contact your midwife or physician for a consult. Increased swelling, often together with a headache, could be the first sign of preeclampsia.
Your baby has his or her own circadian rhythm and all is calm in your uterus when your baby is sleeping. Your baby sleeps several times a day. Most babies are active in the evening and early in the morning. How much a baby kicks, and the force behind the kicks, can vary from baby to baby. Many women feel it is easier to feel the baby move when they are resting on their side.
If you’re worried that your baby is moving less than usual, contact your birth center immediately, day or night. Do not hesitate to reach out to your care provider if you are worried.