From the archive record
Waters break just before bovine delivery The signs of parturition (birth process) are: The udder of the cow enlarges 1 to 2 weeks before calving. This is not a reliable sign in heifers as their udders begin to develop half way through pregnancy.Colostrum is produced (a creamy or pink secretion from the udder). Then pelvic ligaments relax and finally vulva swells (up to six times its normal size) and becomes flabby. White, stringy mucous is secreted from the vagina. The birth process can be divided into three stages: The muscles of the wall of the uterus begin to contract. These contractions occur about every 15 minutes and last from 15 to 30 seconds. This stage may last 3 to 4 hours. The cow will become restless, stand alone, and occasionally strain weakly. The foetal membranes enter the v