A fillie's father is called a sire, same as a colt's. And just for the record their mother is called their dam.
According to the Veterinary Dictionary, a filly is a "young female horse up to first breeding or 4 years...."
To read the rest of the definition, and to read about the various definitions of a filly on Answers.com, click on the Related Link.
Do you mean Filly ?, if so it is a female foal, a young mare.
Minnesota Fillies was created in 1978.
Fillies' Mile was created in 1973.
Fillies' Sprint Stakes was created in 2002.
Chartwell Fillies' Stakes was created in 1994.
Portland Fighting Fillies was created in 2010.
Denny Cordell Fillies Stakes was created in 1996.
Breeders' Cup Juvenile Fillies was created in 1984.
Breeders' Cup Juvenile Fillies Turf was created in 2008.
Kentucky Cup Juvenile Fillies Stakes was created in 1994.
Fillies
Colts and fillies have the same gestation period, so one won't be carried longer than the other.
Yes, the first Kentucky Derby included fillies among its participating horses. There were 13 colts and two fillies. The two chestnut fillies were Ascension and Gold Mine.Ascension placed 10th. She was ridden by Billy Lakeland, the only white rider among a total of 15 jockeys.Gold Mine finished last. She was ridden by Stradford.