COLTS AND FILLY

[Neelia]

is there a reason why I only breed colts. Was hoping number five would be a filly

[Neelia]

The full moon period is apparently also the time to breed fillies. Depending on which quarter of the lunar cycle the mare concieves, you may be able to determine the sex of the foal before you breed the mare.
The optimum time to breed for a filly is from the day before or the day of the first quarter to a few days after the full moon and for colts, the day before or the day of the last quarter until a few days after the new moon. These times change by a day or two each month and there are 2 or three transitional days between each where you have a 50/50 chance of getting a filly or a colt."

[Neelia]

found this on the web. thought it was interesting for all to read, maybe to add this to the game latter would be fun. just a thought.

[BlackOak2]

is there a reason why I only breed colts. Was hoping number five would be a filly

That is an interesting snippet that you found.
On the game it's 'random'. I have found that some bloodlines seem to be more inclined to produce one over the other. I have also found (like many) that the 'better' foal is often a colt and not a filly.
Some may also say that they seem to produce more of one in certain seasons versus others.
However, all of this could still be attributed to the flip of a coin. There is just as much chance to flip a coin 50 times and come up all heads or all tails versus a mix of both as our brains say is what should happen.

It can still be frustrating.