Speed ratings on tires are expressed in letters and are generally listed along with the load index for a tire after the size, for instance 245/40R18 93H. 93 is a load index and the H is the speed rating .â¦. What Does Z Mean On The Tires | Zr Speed Rated | Zr Rating. 1  Differences in Tire Speed Ratings Explained.
Effacement: Thinning of the cervix. In the last month of pregnancy the cervix will begin to stretch and thin. This is an indication that the lower portion of the uterus is getting prepared for delivery, as a thinner cervix dilates more easily. Your health care provider can check for effacement in the final two months of pregnancy.
1 The first few times you feel your cervix, it will be difficult to determine whether it's high or low. 2  Keep feeling every day over the course of a month or two, noting the differences in the position of your cervix from week to week. 3  Eventually you'll be able to tell whether your cervix is low or high.t is located 3 to 6 inches (7.6 to 15.2 cm) inside the vagina, at the end of the vaginal tunnel. It is shaped like a small donut with a tiny hole in the center. The position and texture of the cervix change throughout the ovulation cycle. 1  The inner canal of the cervix contains glands that secrete vaginal mucus.