Plaque Psoriasis. Plaque psoriasis is the most common form of the disease and appears as raised, red patches covered with a silvery white buildup of dead skin cells. These patches or plaques most often show up on the scalp, knees, elbows and lower back.They are often itchy and painful, and they can crack and bleed.hile scientists do not know what exactly causes psoriasis, we do know that the immune system and genetics play major roles in its development. Usually, something triggers psoriasis to flare. The skin cells in people with psoriasis grow at an abnormally fast rate, which causes the buildup of psoriasis lesions.
The average cervix length is 4 to 5 cm, and it is expected to shorten as you get further along into your pregnancy. One study found that at 24 weeks gestation, the average cervix length is 3.5 cm. When cervical length is less than 2.2 cm, women face a 20 percent probability of preterm delivery. Another study found that when the cervical length measures 1.5 cm or less, the risk of spontaneous preterm birth is almost 50 percent.
The degree of dilation is measured in centimeters. For most of your pregnancy, the cervix will be at zero centimeters, closed and not at all dilated, keeping the baby safe and growing inside. During active labor, your health care provider will measure the level of dilation by inserting a gloved finger into your vagina.If a woman is having her first baby, her cervix will probably efface before it dilates; in subsequent pregnancies the cervix may dilate first, then efface.). During the final weeks of pregnancy, your health care provider will examine the cervix and can report on these changes.