No.
Correction: Yes, they are.
Sure there aren't that many (with the introduction of "Softball") but they are allowed in the Minor leagues, as well as the Major leagues.
For more information, check out Jackie Michell (who played in the Minor's, and during an exhibition game with the New York Yankees, she struck out Babe Ruth with four pitches and Lou Gehrig with three), Lizzie Arlington, or the "Bloomer Girls" (a traveling baseball league during the turn of the 20th century).
Minor league baseball was created in 1901.
There are 19 minor league divisions in baseball
Click on the 'Minor League Baseball Statistics' link on this page to go to the minor league's website.
Louisville Colonels - minor league baseball - ended in 1972.
Louisville Colonels - minor league baseball - was created in 1901.
Syracuse Stars - minor league baseball - was created in 1890.
The Designated hitter is allowed only in the American League and throughout the minor leagues.
1921--An agreement was signed which allowed a Major League team to own Minor League teams. Branch Rickey of the St. Louis Cardinals used this to establish the farm system, controlling players at different classifications of Minor League Baseball and developing them for his team. More info at http://www.minorleaguebaseball.com
Minor League Baseball Yearly - MiLBY - Awards was created in 2005.
High school, college, single A minor league,a double AA minor league, and then triple AAA minor league.
Minor league baseball games typically last around 2-3 hours, similar to major league games.
No, the golden league is a league of "independent" teams and while it is still a professional baseball league, it is in no way affiliated with major league baseball. The term "minor league" refers to teams which are owned by major league organizations for the growth of their young talent.