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− | <big><center>[[Reproductive System|'''BACK TO REPRODUCTIVE SYSTEM''']]</center></big>
| + | == Male == |
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− | <big><center>[[Reproductive_System#Small_Domestic_Mammals|'''BACK TO SMALL DOMESTIC MAMMALS''']]</center></big>
| + | === Penis === |
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| + | * Os penis lies within the tissue of the penis. |
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− | <big><center>[[Reproductive System|'''BACK TO REPRODUCTIVE SYSTEM''']]</center></big>
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− | <big><center>[[Reproductive_System#Small_Domestic_Mammals|'''BACK TO SMALL DOMESTIC MAMMALS''']]</center></big>
| + | === Testes === |
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− | <big><center>[[Small_Mammals_-Mouse-_Anatomy_%26_Physiology|'''BACK TO MOUSE''']]</center></big>
| + | * Two testes in an external scrotum. |
| + | * Testes descend into the scrotum at the beginning of the mating season (January) and begin spermatogenesis. |
| + | * Open inguinal canals throughout life. |
| + | ** Allows testes to shrink and return to the abdomen in the non-breeding season. |
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| + | === Puberty and Sexual Maturity === |
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| + | * Sexually mature at 6-7 weeks. |
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− | * [[Chipmunk -Male- Anatomy & Physiology|Male]]
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− | * [[Chipmunk -Female- Anatomy & Physiology|Female]]
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− | == Penis == | + | === Mammary Gland === |
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| + | * Teats are absent. |
| + | == Female == |
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| + | === Reproductive Tract === |
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− | * Os penis lies within the tissue of the penis. | + | * [[Uterus - Anatomy & Physiology#Anatomical_Types_of_Uteri|Bicornate uterus]] |
| + | ** Short uterine body |
| + | ** Single [[Cervix - Anatomy & Physiology|cervix]] |
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− | ----
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− | == Testes == | + | === Puberty and Sexual Maturity === |
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− | * Two testes in an external scrotum. | + | * Sexually mature at 12 months. |
− | * Testes descend into the scrotum in January and begin spermatogenesis.
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− | * Open inguinal canals throughout life.
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− | ** Allows testes to shrink and return to the abdomen in the non-breeding season.
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− | ----
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− | == Puberty and Sexual Maturity == | + | === Oestrous Cyclicity === |
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− | * Sexually mature at 6-7 weeks. | + | * Seasonally Polyoestrous. |
| + | * Spontaneous ovulator. |
| + | * Breeding season is March-September. |
| + | * Length of [[Oestrous Cycle - Anatomy & Physiology|oestrous cycle]]: 14 days |
| + | * '''Oestrus''' lasts three days. |
| + | * Advertises willingness to mate with persistent chipping noise on the second day of oestrus. |
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− | ----
| + | === Gestation and Offspring === |
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− | == Mammary Gland == | + | ==== Gestation ==== |
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− | * Teats are absent. | + | * Gestation period 28-32 days. |
− | ----
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− | == Female == | + | ==== Litter ==== |
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− | * [[Female_Reproductive_Tract_-The_Uterus_-_Anatomy_%26_Physiology#Anatomical_Types_of_Uteri|Bicornate uterus]] | + | * Litter size 2-6 |
− | ** Short uterine body | + | * Altricial young |
− | ** Single [[Female_Reproductive_Tract_-The_Cervix_-_Anatomy_%26_Physiology|cervix]] | + | ** Weaned at 6-7 weeks |
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| + | === Mammary Gland === |
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− | * '''Seasonally polyoestrous'''* Spontaneous ovulators | + | * 4 pairs of teats. |
− | * Breeding season March-September
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− | * '''Oestrus''' lasts three days
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− | * Advertises willingness to mate with persistent chipping noise on the second day.
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− | * 4 pairs of teats
| + | [[Category:Small Mammal Reproduction]] |
| + | [[Category:Bullet Points]] |