The fetus is now considered full term - its skin is plump, the lungs are mature, the mammary glands and external genital structures are visible. There is some lanugo on the shoulders and back; some of the vernix remains in the folds of the skin, especially around the groin and armpits. There are creases on the soles of the feet. Baby now fills most of the uterus and it moves into the birth position. The head points down toward the birth canal while the arms and legs are pulled close to the chest. Like the newborn, the fetus spends most of its time sleeping but its body rhythms, responses and activity patterns are established. Its intestines are filled with meconium - a sticky greenish black substance that is made up of alimentary gland secretions, lanugo, pigment and cells from the wall of your bowel; this will be passed during baby's bowel movements after its birth. Baby now weighs a little over 7lb (3.25kg) and the full length is almost 21.5in (48cm) while from crown to rump baby is 36cm or 14½ in.