Ringwomb is an incompletely dilated cervix more than six hours after foetal membranes first appear at the vulva. Typically the entrance to the womb is only 3 to 5 cm in diameter allowing passage of only two or three fingers. The number of cases of ringwomb in a flock varies between farms and between years.
In temperate regions sheep are seasonal breeders, with breeding dictated by day length. In temperate countries, sheep tend to be seasonal, short day breeders although the onset and length of the breeding season can be breed-dependent. In countries where there is little fluctuation in day length, sheep generally breed year round.
Vaginal prolapse occurs during the last month of pregnancy. Any ewes which have prolapsed must be clearly identified and culled at the end of the season as they will most likely re-prolapse if allowed to breed again. The size of a vaginal prolapse can vary from a small area of dorsal vaginal wall to a larger structure of up to 20 cm when the prolapse may contain urinary bladder, uterine horn s or both of these structures.
Seventeen cases of spontaneous, partial or total vaginal rupture, in pregnant ewes, involving the dislocation and herniation of the intestines and uterus, were studied. Four of them also had a uterine torsion, and three of these recovered after treatment. In the remaining 13 cases the condition of the uterus was unknown.
Why do farmers do it? And how does it work? Twinning-on a lamb is process of taking a triplet or a pet caddy lamb and giving it to a ewe with a single lamb.
Annual ewe mortality in lowground flocks in the UK is quoted between 5 to 7 per cent with an estimated 70 per cent occurring during late pregnancy and associated with dystocia lambing difficulties. There has been a disturbing trend in the United Kingdom over the past 10 years towards fewer veterinary visits for obstetrical problems because of perceived costs. The most significant single influence on the welfare of any flock is the shepherd.
Enzootic abortion in sheep, caused by Chlamydia psittaci, has been associated with pregnancy failure in most sheep-producing countries. Late-term abortions or the birth of weak low-birth-weight lambs occurred following primary C. However, the mode by which C.
Eversion and prolapse of the vagina, with or without prolapse of the cervix, occurs most commonly in cattle and sheep. A form of vaginal prolapse, different in pathogenesis, also occurs in dogs see Vaginal Hyperplasia in Small Animals. In cattle and sheep, the condition is usually seen in mature females in the last trimester of pregnancy. Intra-abdominal pressure is increased in recumbent animals.