mom to 4
Well-known member
Just something I've been wondering about. Does freemartinism occur in other species? In all ruminants? In deer? Anybody know much about it?
mom to 4":c46f85nj said:Anybody know much about it?
sorry I meant totally different w/ no mixed antigensDifferent PlacentasKeren":16oolz9q said:I know from experience that it doesn't happen in goats, but I'm not sure of the science behind it.
*Cowgirl*":3qp8msee said:Different PlacentasKeren":3qp8msee said:I know from experience that it doesn't happen in goats, but I'm not sure of the science behind it.
milkmaid":ot5il0v2 said:*Cowgirl*":ot5il0v2 said:Different PlacentasKeren":ot5il0v2 said:I know from experience that it doesn't happen in goats, but I'm not sure of the science behind it.
Cattle have separate placentas for each fetus too, but freemartinism occurs when there is a blood transfer between fetuses... ie the placentas grow together, although I do hear it can even happen if the fetuses are in separate uterine horns.
Yes. Such as sheep, goats, horses, donkeysDoes freemartinism occur in other species?
I don't see why it couldn't.In all ruminants?
Yes.In deer?
Does a cow that has had one freemartin have higher than normal odds of having another?
Sir Loin":3a69u7vm said:Re:
Yes. Such as sheep, goats, horses, donkeysDoes freemartinism occur in other species?
I don't see why it couldn't.In all ruminants?
Is a mule a ruminant ? If so, my answer is no.
Yes.In deer?
SL
From the Merck Vet Manual...
Freemartins are sterile females born twin to a male. In cattle with multiple conceptions, the chorionic placental blood vessels form a common circulation between the fetuses prior to sexual differentiation, allowing antimüllerian duct hormone and testosterone secreted by the male to inhibit development of the female tract. In ~92% of cases of mixed-sex twins, the females are sterile. The tubular genital organs in affected animals range from cordlike bands to near normal uterine horns. Freemartins have a short vagina that ends blindly without communication with the uterus. The cervix is absent. The ovaries usually fail to develop and remain small. Normal and freemartin cattle can be differentiated on the basis of length of the vagina and on presence or absence of a cervix. In calves (1-4 wk old), the normal vaginal length is 13-15 cm, while in a freemartin vaginal length is 5-6 cm. Vaginal length is easily measured by gently inserting a well-lubricated probe with a blunt end into the vagina. Cytogenetic examination can demonstrate XX and XY chromosome patterns in freemartins. The interchange of cells that occurs in the placental circulation between the fetuses can also be demonstrated by detecting 2 different blood types in a single animal.
Occasionally a doe is born that cannot become pregnant. A freemartin is a sterile female of a male twin. During fetal development, male hormones can be transferred through placental walls and render a female incapable of breeding. This is a relatively rare situation in most herds. In 15 years of goat production, this writer has seen what she believes to be freemartinism in her herd only one time.
http://www.tennesseemeatgoats.com/artic ... obs06.html
Successful twin pregnancies are very rare in camelids but can occur. Freemartinism has been described in females born co-twin to males.
http://www.ivis.org/advances/camel_Skid ... m.asp?LA=1
True, but the question was "Does freemartinism occur in other species?" which includes subspecies. Those I listed were just a few cases I found.FYI, horses, donkeys, mules, and zebras all fall under the classification of equine. Equines are not ruminants.
If you don't know what you're talking about, SL, please do the newbies a favor and refrain from answering their questions.
mom to 4":37wbr14w said:Just something I've been wondering about. Does freemartinism occur in other species? In all ruminants? In deer? Anybody know much about it?
Freemartinism is primarily described in cattle and, although rare, it also occurs in sheep, goats, and swine.
Source: http://medicine.ucsd.edu/cpa/horse.htmlNevertheless, at least two cases of freemartinism in horses due to chimerism and placental anastomoses were reviewed earlier (Benirschke, 1970).
Sir Loin":1g412syk said:Peg 4X4,
Darn you! You're right but I set that trap for milkmaid.
Shame on you for spoiling my fun! :lol: :lol: :lol:
SL
Sir Loin":2x0gwblj said:Q. Have you ever heard of a mule giving birth to twins?
Q. What does an animal's digestive system have to do with their reproductive system?
I said nothing about deer. I haven't looked them up. The source I quoted mentioned camelids, which happen to be CAMELS.And thank you for proving I was right about goats and deer. So back at ya!
milkmaid":50i3te04 said:And thanks Bama and msscamp. Really appreciate your comments.
Take care!