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* 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 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 lumbar vertebra.  
 
* The endometrium of the uterine body and horns contain no caruncles and the uterine glands are simple, branched and tubular.
 
* The endometrium of the uterine body and horns contain no caruncles and the uterine glands are simple, branched and tubular.
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* 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.
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* By 150 days the diameters of the gravid and non-gravid horns are nearly 4 times their original sizes.
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* Endometrium increases in size and the glands become more numerous.
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* 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.
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* The uterus returns to its normal non-pregnant position between 20 - 45 days after parturition.
    
== Hymen ==
 
== Hymen ==
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