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.n 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.
The recommendation stated that a person should have 1 ml (about 1/5 of a teaspoon) of water for each calorie he or she consumes. The average diet at the time was approximately 1900 calories, meaning you needed about 64 ounces of water per day.
1 A two hundred pound man and 100 pound woman require different amounts of water every day.  Multiply by 2/3: Next you want to multiple your weight by 2/3 (or 67%) to determine how much water to drink daily. For example, if you weighed 175 pounds you would multiple that by 2/3 and learn you should be drinking about 117 ounces of water every day.