Difference between revisions of "Hamster Reproduction - Anatomy & Physiology"

From WikiVet English
Jump to navigation Jump to search
(30 intermediate revisions by 3 users not shown)
Line 1: Line 1:
−
== Male ==
+
<big><center>[[Reproductive System|'''BACK TO REPRODUCTIVE SYSTEM''']]</center></big>
  
−
The anogenital distance is longer in the male, which has a more prominent genital papilla.
+
<big><center>[[Reproductive_System#Small_Domestic_Mammals|'''BACK TO SMALL DOMESTIC MAMMALS''']]</center></big>
−
=== Penis ===
 
  
−
* Os penis lies within the tissue of the penis.
 
−
** Supporting bone is the Baculum.
 
−
*** Baculum consists of two lateral prongs and a dorsal prong.
 
  
−
=== Testes===
 
  
−
* Two large testes in an external scrotum.
+
* [[Hamster-Male- Anatomy & Physiology|Male]]
−
** Retained in the scrotum by a pad of fat in the inguinal canal.
+
* [[Hamster-Female- Anatomy & Physiology|Female]]
−
* Chinese Hamster:
 
−
** Testes remain internal.
 
  
−
=== Accessory Sex Glands ===
 
  
−
* Several large [[Accessory Sex Glands - Anatomy & Physiology|accessory glands]] including:
 
−
** Ampulla Glands
 
−
** Seminal Vesicles
 
−
** Coagulating Glands
 
−
** Prostate (three-lobed)
 
−
** Bulbourethral Glands
 
−
* Produce a urethral plug.
 
  
−
* Scent gland on each flank to mark territory.
 
  
−
=== Mammary Gland===
 
  
−
* Teats are absent.
 
  
 
== Female ==
 
== Female ==
  
−
=== Reproductive Tract ===
 
  
−
==== Ovary ====
+
== Reproductive Tract ==
  
−
* [[Ovary - Anatomy & Physiology|Ovaries]] are oval in shape, situated dorsolateral to the kidneys.
+
* Bicornuate uterus
−
** Completely enclosed in a fat-filled ovarian bursa.
+
** Two long uterine horns
−
** Uterine artery provides a major blood supply to the [[Ovary - Anatomy & Physiology|ovary]].
+
** Little uterine body
−
** Coils of the ovarian and uterine arteries anastoamose close to the [[Ovary - Anatomy & Physiology|ovary]].
 
  
−
==== Oviduct ====
+
----
  
−
* [[Oviduct - Anatomy & Physiology|Oviduct]] is long and tighly coiled.
+
== Oestrous Cyclicity ==
  
−
==== Uterus ====
+
* Spontaneous ovulator.
−
 
 
−
* [[Uterus - Anatomy & Physiology#Anatomical_Types_of_Uteri|Duplex Uterus]]
 
−
** Two seperate [[Cervix - Anatomy & Physiology|cervices]].
 
−
** Uterine horns remain divided until uniting in a single [[Vagina and Vestibule - Anatomy & Physiology|vagina]].
 
−
 
 
−
==== Vagina ====
 
−
 
 
−
* The urinary opening is cranial and the anus is caudal with the vaginal opening in between.
 
−
* [[Vagina and Vestibule - Anatomy & Physiology|Vagina]] has a pair of vaginal pouches.
 
−
** Extend caudally, terminating at the level of the vaginal orifice.
 
−
 
 
−
=== Oestrous Cyclicity ===
 
−
 
 
−
* Spontaneous [[Ovulation - Anatomy & Physiology|ovulator]].
 
−
** [[Ovulation - Anatomy & Physiology|Ovulation]] occurs ~ 12 hours after the LH surge, usually resulting in the release of ova at night (hamsters are nocturnal).
 
 
* Seasonally polyoestrus
 
* Seasonally polyoestrus
 
* Oestrus every 5-7 days
 
* Oestrus every 5-7 days
−
** Secretes copious white vaginal discharge during oestrus.
+
** Secrete copious white vaginal discharge during oestrus.
−
*** Changes consistency from stringy to waxy over the 3 day oestrus period.
 
 
* Post-partum oestrus
 
* Post-partum oestrus
  
−
=== Copulation ===
+
----
 +
 
 +
== Copulation ==
  
−
* Lasts 30 minutes.
 
 
* Mating may be confirmed by the presence of a ''''copulatory plug''''.
 
* Mating may be confirmed by the presence of a ''''copulatory plug''''.
−
** A creamy, gelatinous plug formed from secretions of the male [[Accessory Sex Glands - Anatomy & Physiology|accessory glands]].
+
** A creamy, gelatinous plug formed from secretions of the male [[Male_Reproductive_Tract_-Accessory_Sex_Glands_-_Anatomy_%26_Physiology|accessory glands]].
−
* Pseudopregnancy can occur after an infertile mating.
+
 
 +
----
  
−
=== Mammary Gland ===
+
== Mammary Gland and Lactation ==
  
 
* 6 pairs of teats
 
* 6 pairs of teats
−
* Extend from the thoracic to inguinal region.
 
−
 
−
 
−
=== Breed Differences ===
 
  
−
==== Syrian (Golden) hamster ====
+
----
  
−
[[Image:hamster fetus.jpg|thumb|right|150px|Syrian Hamster Foetus during Late Gestation- Courtesy of Andrew Crook, Copyright RVC 2008]]
+
== Breed Differences ==
  
−
* Sexually mature at 6-8 weeks  
+
* '''Syrian (Golden) hamster'''
−
* Gestation period: 6-8 days
+
** Sexually mature at 6-8 weeks  
−
* Litter size 5-9: offspring
+
** Gestation period: 6-8 days
 +
** Litter size 5-9: offspring
 
** Weaned at 21-28 days.
 
** Weaned at 21-28 days.
  
−
==== Russian Hamster ====
 
  
−
* Sexually mature at 6-8 weeks  
+
* '''Russian Hamster'''
−
* Gestation period: 6-8 days
+
** Sexually mature at 6-8 weeks  
−
* Litter size: 4 offspring
+
** Gestation period: 6-8 days
−
** Will cannabilise young if disturbed.
+
** Litter size: 4 offspring
 +
*** Will cannabilise young if disturbed.
 
** Weaned at 16-18 days.
 
** Weaned at 16-18 days.
  
−
==== Chinese Hamster ====
 
  
−
* Sexually mature at 7-14 weeks
+
* '''Chinese Hamster'''
−
* Gestation period 7-14 days  
+
** Sexually mature at 7-14
−
* Litter size: 4 offspring
+
** Gestation period 7-14 days  
−
** Will cannabilise young if disturbed.
+
** Litter size: 4 offspring
 +
*** Will cannabilise young if disturbed.
 
** Weaned at 21 days.
 
** Weaned at 21 days.
  
−
[[Category:Small Mammal Reproduction]]
+
----
−
[[Category:Bullet Points]]
 

Revision as of 12:51, 18 July 2008

BACK TO REPRODUCTIVE SYSTEM
BACK TO SMALL DOMESTIC MAMMALS





Female

Reproductive Tract

  • Bicornuate uterus
    • Two long uterine horns
    • Little uterine body

Oestrous Cyclicity

  • Spontaneous ovulator.
  • Seasonally polyoestrus
  • Oestrus every 5-7 days
    • Secrete copious white vaginal discharge during oestrus.
  • Post-partum oestrus

Copulation

  • Mating may be confirmed by the presence of a 'copulatory plug'.

Mammary Gland and Lactation

  • 6 pairs of teats

Breed Differences

  • Syrian (Golden) hamster
    • Sexually mature at 6-8 weeks
    • Gestation period: 6-8 days
    • Litter size 5-9: offspring
    • Weaned at 21-28 days.


  • Russian Hamster
    • Sexually mature at 6-8 weeks
    • Gestation period: 6-8 days
    • Litter size: 4 offspring
      • Will cannabilise young if disturbed.
    • Weaned at 16-18 days.


  • Chinese Hamster
    • Sexually mature at 7-14
    • Gestation period 7-14 days
    • Litter size: 4 offspring
      • Will cannabilise young if disturbed.
    • Weaned at 21 days.
Retrieved from "https://en.wikivet.net/index.php?title=Hamster_Reproduction_-_Anatomy_%26_Physiology&oldid=20880"