Changes

* Ova shed from the right ovary must migrate down the right Uterine Horn to the Uterine Body and up the left Uterine Horn in order to [[Fertilisation%2C_Implantation_and_Early_Embryonic_Development_-Implantation-_Anatomy_%26_Physiology|establish pregnancy]].

* Ova shed from the right ovary must migrate down the right Uterine Horn to the Uterine Body and up the left Uterine Horn in order to [[Fertilisation%2C_Implantation_and_Early_Embryonic_Development_-Implantation-_Anatomy_%26_Physiology|establish pregnancy]].

* In immature females the uterus is very small and can be found entirely within the pelvic cavity, whereas in mature non-pregnant females it is located in the abdominal cavity at the level of the 5th, 6th and 7th [[Spinal_Column_-_Anatomy_%26_Physiology#Lumbar_Vertebrae|lumbar vertebra]].  

* In immature females the uterus is very small and can be found entirely within the pelvic cavity, whereas in mature non-pregnant females it is located in the abdominal cavity at the level of the 5th, 6th and 7th [[Spinal_Column_-_Anatomy_%26_Physiology#Lumbar_Vertebrae|lumbar vertebra]].  

* The endometrium of the uterine body and horns contain no caruncles and the uterine glands are simple, branched and tubular.

* The [[Female_Reproductive_Tract_-The_Uterus_-_Anatomy_%26_Physiology#Structure|endometrium]] of the uterine body and horns contain no caruncles and the uterine glands are simple, branched and tubular.

* In the gravid uterus the left uterine horn, in which the fetus implants, becomes noticeably distended at around 1.5 months of pregnancy and is almost double its size by 2 months at which time the uterus hangs into the abdominal cavity.

* In the gravid uterus the left uterine horn, in which the fetus implants, becomes noticeably distended at around 1.5 months of pregnancy and is almost double its size by 2 months at which time the uterus hangs into the abdominal cavity.

* By 150 days the diameters of the gravid and non-gravid horns are nearly 4 times their original sizes.

* By 150 days the diameters of the gravid and non-gravid horns are nearly 4 times their original sizes.

* Endometrium increases in size and the glands become more numerous.

* [[Female_Reproductive_Tract_-The_Uterus_-_Anatomy_%26_Physiology#Structure|Endometrium]] increases in size and the glands become more numerous.

* The non-involuted post-partum uterus hangs over the brim of the pelvis. The uterine wall is thickened, oedematous and in the early postpartum period the uterus contains a small amount of old blood.

* The non-involuted post-partum uterus hangs over the brim of the pelvis. The uterine wall is thickened, oedematous and in the early postpartum period the uterus contains a small amount of old blood.

* The uterus returns to its normal non-pregnant position between 20 - 45 days after parturition.

* The uterus returns to its normal non-pregnant position between 20 - 45 days after parturition.