Placenta previa facts. 1  Placenta previa is the attachment of the placenta to the wall of the uterus in a location that completely or partially covers the uterine outlet (opening of the cervix). 2  Bleeding after the 20th week of gestation is the main symptom of placenta previa.
FRONTLINE Brand Products remain effective for 30 days, even if a pet swims or is bathed. After application, keep the dog or cat from getting wet until the application area appears dry, usually 24 hours. If a FRONTLINE Brand Product is to be applied after a bath, make sure the pet is completely dry before application.
Water Softeners and Softening Resins How long is the backwash time for a Water Softener? Minimum backwash time is 5 minutes. Generally the backwash time is factory set at 10 minutes. If the water is not clear then the backwash time can be as long as 20 minutes. How long is the brine and slow rinse for a Water Softener? This depends on the salt dosage selected for the softener. The default setting is 60 minutes.