Mare Gestation Table
| Date Bred | Due Date (340 days) | Date Bred | Due Date (340 days) |
| January 1 | December 7 | May 1 | April 6 |
| January 6 | December 12 | May 6 | April 11 |
| January 16 | December 22 | May 11 | April 16 |
| January 21 | December 27 | May 16 | April 21 |
| January 26 | January 1 | May 21 | April 26 |
| January 31 | January 6 | May 26 | May 1 |
| February 5 | January 11 | May 31 | May 6 |
| February 10 | January 16 | June 5 | May 11 |
| February 15 | January 21 | June 10 | May 16 |
| February 20 | January 26 | June 15 | May 21 |
| February 25 | January 31 | June 20 | May 26 |
| March 2 | February 5 | June 25 | May 31 |
| March 7 | February 10 | June 30 | June 5 |
| March 12 | February 15 | July 5 | June 10 |
| March 17 | February 20 | July 10 | June 15 |
| March 22 | February 25 | July 10 | June 20 |
| March 27 | March 2 | July 20 | June 25 |
| April 1 | March 7 | July 25 | June 30 |
| April 6 | March 12 | July 30 | July 5 |
| April 11 | March 17 | August 4 | July 10 |
| April 16 | March 22 | August 9 | July 15 |
| April 21 | March 27 | August 9 | July 20 |
| April 26 | April 1 | August 19 | July 25 |
| Date Bred | Due Date (340 days) | Date Bred | Due Date (340 days) |
| August 24 | July 30 | October 3 | September 8 |
| August 29 | August 4 | October 8 | September 13 |
| September 3 | August 9 | October 13 | September 18 |
| September 8 | August 14 | October 18 | September 23 |
| September 13 | August 19 | October 23 | September 28 |
| September 18 | August 24 | October 28 | October 3 |
| September 23 | August 29 | November 2 | October 8 |
| September 28 | September 3 | November 7 | October 13 |