Twins pics

[Circle M]

My last cow to calve had a nice set of twins one bull one heifer , my question is why do they call them free martins ?

[CattleArmy]

Not sure why they call them free martins but usually they behave more like thier counterparts and have nonfunctioning ovaries.

[Jassy]

Cool pictures! 2 for the price of 1...doubled your money in one shot...

[WyomingRancher]

From Wikipedia, the free encyclopedia

A freemartin or free-martin (sometimes martin heifer) is a female bovine with a masculinized behavior and non-functioning ovaries. Genetically and externally the animal is female, but it is sterilized in utero by hormones from a male twin, becoming an infertile partial intersex.[1]

Congrats on being done calving, and ending with an extra

[Circle M]

i was doing some searching and found this article , it worked out good actually for me i bought her at the sale barn last thursday for $400 as long as she can raise both of them i will be happy



Freemartinism is recognized as one of the most severe forms of sexual abnormality among cattle. This condition causes infertility in the female cattle born twin to a male. When a heifer twin shares the uterus with a bull fetus, they also share the placental membranes connecting the fetuses with the dam. A joining of the placental membranes occurs at about the fortieth day of pregnancy, and thereafter, the fluids of the two fetuses are mixed. This causes exchange of blood and antigens carrying characteristics that are unique to each heifers and bulls. When these antigens mix, they affect each other in a way that causes each to develop with some characteristics of the other sex. Although the male twin in this case is only affected by reduced fertility, in over ninety percent of the cases, the female twin is completely infertile. Because of a transfer of hormones or a transfer of cells, the heifer's reproductive tract is severely underdeveloped and sometimes even contains some elements of a bull's reproductive tract. A freemartin is genetically female, but has many characteristics of a male. The ovaries of the freemartin do not develop correctly, and they remain very small. Also, the ovaries of a freemartin do not produce the hormones necessary to induce the behavioral signs of heat. The external vulvar region can range from a very normal looking female to a female that appears to be male. Usually, the vulva is normal except that in some animals an enlarged clitoris and large tufts of vulvar hair exist. Freemartinism cannot be prevented; however, it can be diagnosed in a number of ways ranging from simple examination of the placental membranes to chromosomal evaluation. The cattleman can predict the reproductive value of this heifer calf early and save the feed and development costs if he is aware of the high probability of freemartinism. In some cases, there are no symptoms of freemartinism because the male twin may have been aborted at an earlier stage of gestation. Estimates of the percentage of natural beef cattle births that produce twins vary. One estimate (Gilmore) puts the percentage at about .5% or 1 in every 200 births. Approximately one-half of the sets of twins should contain both a bull and a heifer calf.

Even if the heifer has all the external features of being a female, many times the female reproductive tract is not fully developed. You can check at weaning time by trying to pass an AI rod as if you were AIing and the rod will only pass but only a short distance. DO NOT push or force the rod as it may puncture the tract.

[CattleArmy]

Here we just sell them and don't even waste the feed on the chance.