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| | '''[[Oestrus Cycle - Donkey|Oestrous cycle]] | | '''[[Oestrus Cycle - Donkey|Oestrous cycle]] |
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| | + | '''[[Pregnancy - Donkey|Pregnancy]] |
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| | </big> | | </big> |
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| − | ==Pregnancy==
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| − | Ultrasonographic characteristics of the asinine early pregnancy have been described, and present several similarities with the horse (Meira ''et al'', 1998; Carluccio ''et al'', 2005).
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| − | ===Early pregnancy diagnosis===
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| − | [[Image:Ultrasound pregnancy diagnosis jenny donkey.jpg|right|thumb|300px|<small><center>Assessment of foetal well-being by trans-abdominal ultrasonography. In late pregnancy this technique requires clipping the hair over an area from the xyphoid to the udder and the use of a 3.5 MHz sector transducer. (Image courtesy of [http://drupal.thedonkeysanctuary.org.uk The Donkey Sanctuary])</center></small>]]
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| − | The '''embryonic vesicle can be detected by transrectal ultrasonography from days 10 to 12 post-ovulation (11.5 ± 0.9 days)'''. <u>Fixation of the embryonic vesicle occurs 15.5 ± 1.4 days after ovulation.</u> The mean growth rate of the embryo is 3 to 3.5 mm per day until 18 days. The vesicle becomes irregular and grows more slowly (0.4 to 0.5 mm per day) from day 19 until day 29.
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| − | '''The heartbeat is detected at 23.5 ±1.3 days.'''
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| − | Secondary ''corpora lutea'' are formed between days 38 and 46 (41.8 ±1).'''Plasma progesterone''' increases in the first 19 days to about 19.9 ng/ml then decreases to 12 ng/ml at day 30. Another increase is seen between day 30 to 40 (17 ng/ml). Progesterone gradually declines between 110 and 160 days and remains at about 6 ng/ml. '''Chorionic gonadotropin''' is secreted after day 36 of pregnancy (Meira ''et al'', 1998a; Meira ''et al'', 1998b).
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| − | Foetal well-being and the foeto-placental unit can be evaluated in the same manner as for the horse. In late pregnancy, the foetus is generally very deep and cranially situated in the abdomen.
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| − | {{toplink
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| − | |titleborder=E0EEEE
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| − | |linkpage =Female Reproduction - Donkey
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| − | |linktext =Female Reproduction - Donkey
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| − | |pagetype = Donkey
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| − | [[Category:Donkey]]
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| − | {{toplink
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| − | |titleborder=E0EEEE
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| − | |linkpage = Sponsors
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| − | |linktext = This page was sponsored and content provided by ''THE DONKEY SANCTUARY''
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| − | }}
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| | ==Parturition and ''post-partum''== | | ==Parturition and ''post-partum''== |
| | [[Image:Late term jenny donkey.jpg|right|thumb|300px|<small><center>Late term pregnant female showing mammary development and ventral oedema. Although this development takes place primarily in the last 48 hours of pregnancy, it may be present in some females up to two weeks before parturition. (Image courtesy of [http://drupal.thedonkeysanctuary.org.uk The Donkey Sanctuary])</center></small>]] | | [[Image:Late term jenny donkey.jpg|right|thumb|300px|<small><center>Late term pregnant female showing mammary development and ventral oedema. Although this development takes place primarily in the last 48 hours of pregnancy, it may be present in some females up to two weeks before parturition. (Image courtesy of [http://drupal.thedonkeysanctuary.org.uk The Donkey Sanctuary])</center></small>]] |
