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Chinchilla Reproduction - Anatomy & Physiology (view source)
Revision as of 12:07, 3 September 2008
, 12:07, 3 September 2008no edit summary
{{toplink
|backcolour =EED2EE
|linkpage =Reproductive System - Anatomy & Physiology
|linktext =Reproductive System
|maplink = Reproductive System (Content Map) - Anatomy & Physiology
|pagetype =Anatomy
|sublink1=Reproductive System - Anatomy & Physiology#Small Domestic Mammals
|subtext1=SMALL DOMESTIC MAMMALS
}}
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== MALE ==
=== Scrotum and Testes ===
= MALE =
== Scrotum and Testes ==
* Only a very slight scrotal region is visible externally (no true scrotum).
* Only a very slight scrotal region is visible externally (no true scrotum).
* Thin-walled '''scrotal diverticula''' extend cranially on either side of the base of the penis.
* Thin-walled '''scrotal diverticula''' extend cranially on either side of the base of the penis.
== Accessory Sex Glands==
=== Accessory Sex Glands===
=== Vesicular Glands ===
==== Vesicular Glands ====
* Very long and tubular.
* Very long and tubular.
=== Prostate Gland ===
==== Prostate Gland ====
* Paired large ventral lobes and paired small dorsal lobes.
* Paired large ventral lobes and paired small dorsal lobes.
=== Bulbourethral Glands ===
==== Bulbourethral Glands ====
* Dorsolateral to '''ischiocavernosus muscles'''.
* Dorsolateral to '''ischiocavernosus muscles'''.
** Ischiocavernosus muscles are enormous, swelling on either side of the rectum and meeting over its top.
** Ischiocavernosus muscles are enormous, swelling on either side of the rectum and meeting over its top.
== Penis ==
=== Penis ===
* Penis points caudally when relaxed and cranially when [[Reproductive_Behaviour_-_Erection_-_Anatomy_%26_Physiology|erect]].
* Penis points caudally when relaxed and cranially when [[Reproductive_Behaviour_-_Erection_-_Anatomy_%26_Physiology|erect]].
== Copulation ==
=== Copulation ===
* [[Male_Reproductive_Tract_-Spermatogenesis_and_Spermiation_-_Anatomy_%26_Physiology|Spermatogenesis]] occurs at about 2-3 months.
* [[Male_Reproductive_Tract_-Spermatogenesis_and_Spermiation_-_Anatomy_%26_Physiology|Spermatogenesis]] occurs at about 2-3 months.
* '''Copulatory plug''' at mating.
* '''Copulatory plug''' at mating.
== FEMALE ==
= FEMALE =
== Reproductive Tract ==
=== Reproductive Tract ===
* [[Female_Reproductive_Tract_-The_Ovary_-_Anatomy_%26_Physiology|Ovaries]] are just caudolateral to the [[Kidney_-_Comparative_Anatomy_%26_Physiology|kidneys]].
* [[Female_Reproductive_Tract_-The_Ovary_-_Anatomy_%26_Physiology|Ovaries]] are just caudolateral to the [[Kidney_-_Comparative_Anatomy_%26_Physiology|kidneys]].
== Puberty and Sexual Maturity ==
=== Puberty and Sexual Maturity ===
* '''Puberty''' at ~8 months
* '''Puberty''' at ~8 months
== Oestrous Cyclicity ==
=== Oestrous Cyclicity ===
* In the Northern Hemisphere the breeding season is November-May.
* In the Northern Hemisphere the breeding season is November-May.
== Gestation and Offspring==
=== Gestation and Offspring===
=== Gestation ===
==== Gestation ====
* Long [[Reproductive_System#Gestation|gestation]] period: 111 days.
* Long [[Reproductive_System#Gestation|gestation]] period: 111 days.
=== Litter ===
==== Litter ====
* Litter size 1-6
* Litter size 1-6
** Weaning age is 6 weeks.
** Weaning age is 6 weeks.
== Mammary Gland ==
=== Mammary Gland ===
* Three pairs
* Three pairs
** Two lateral thoracic
** Two lateral thoracic
* Teats protrude sideways, allowing the young to sit beside the dam and suckle.
* Teats protrude sideways, allowing the young to sit beside the dam and suckle.