The white, waxy coating protecting your baby’s skin (vemix) thickens this week. When your baby is born, you may see traces of vernix firsthand, especially under your baby's arms, behind the ears and in the groin area. At the same time, the soft, downy hair that has grown on the skin for the past several months (lanugo) is now almost completely gone.
During the last trimester of your pregnancy, you may discover you leak a little urine when you cough, sneeze, exercise or lift something. It is quite normal as your uturus enlarges and puts pressure on your bladder. A few weeks before labor begins or at the beginning of labor, you may notice a change in your abdomen. When examined by your doctor, measurement from your bellybutton or the pubic symphysis to the top of the uterus may be smaller than a previous visit. This phenomenon occurs as the head of the babyenters the birth canal. This doesn't occur with every woman or with every pregnancy. It's also common for your baby to drop just before labor begins or during labor.
The weight gain continues to increase. The eyes respond to bright lights and the baby will practise blinking. Eyebrows and eyelashes are fully developed. A boy's testicles will have descended into the groin. The baby is 17.7 inches (45 cm) long and weighs about 4.7 pounds (2,1 kg)