Clinical Anatomy of the Reproductive Tract

 

Female

 

Drawing of the reproductive tract of the female

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Rear of a female pig

Detail of the open vulva

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The non pregnant female reproductive tract

The female reproductive tract at parturition

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Detail of the uterotubal junction

Ovaries

Gross changes during the reproductive cycle

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Anoestrus

Follicles

Corpora haemorrhagica

Corpora lutea

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The foetal membranes around 20 days of gestation

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The mammary glands lateral view

Detail of the nipple and one mammae

Mammay gland anat

Cross section of the mammary gland, with ink injected post-mortem to delineate each of the two mammary glands supplying the common nipple

 


Pregnancy in the pig

 

Day

Event

- 1

Coitus

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Repro1 copy

0.5-1

Ovulation

Capture of eggs

Descent through oviduct

Fertilization

2-3

Decent into uterus

3- 14

Free migration through both horns

7

Hatching

10

Blastocyst oestrogens

7-14

Elongation to 1 metre

14-28

Implantation min 2 per horn

14-17

Release of oestrogens

24

Organogenesis complete

35

Bone present

70

Immunocomplement

105

Foetal corticosteroids

115

Parturition

 

Estimation of embryonic age

 

Crown Rump mm

Days of pregnancy

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Crown-Rump = 80 mm \age ~ 48 days

20

30

50

40

88

50

130

60

167

70

200

80

232

90

264

100

290

110

 

Easy calculator [ (Crown-Rump length mm)/3 ] + 21 = age of foetus in days

 

Detail on the changes in the foetus during pregnancy