LEXINGTON, Ky. – Zenyatta is in foal.

The 7-year-old Street Cry mare’s pregnancy appeared on an ultrasound scan Thursday morning, 15 days after her mating to Bernardini. Such scans are routine for mares at around two weeks past breeding in order to identify whether the mare is carrying an embryo.

Dottie Ingordo-Shirreffs, wife of Zenyatta’s former trainer John Shirreffs and racing manager for the mare’s owners Ann and Jerry Moss, announced the pregnancy on a diary that purports to be written by Zenyatta.

Responding to smaller foal crops in Britain and Ireland, the Tattersalls auction house has made some changes to Europe’s largest Thoroughbred yearling sale, the Tattersalls October auction.

The Ocala Breeders’ Sales Company has postponed this week’s scheduled under-tack show for its March 15-16 select juvenile auction because of forecast rain and high wind. The under-tack preview had been scheduled for Thursday and Friday but now will take place on Friday and Saturday.

Under the new schedule, Hip Nos. 1-244 will breeze on Friday, and Hip Nos. 245-490 will breeze on Saturday. Both sessions will begin at 8 a.m. at the OBS facility in Ocala, Fla.

The stallion Snow Ridge has been relocated from Pennsylvania to Texas to stand at Bradford Thoroughbred Farm in Palestine, the Texas Thoroughbred Association announced on Tuesday. His fee has been set at $2,500.

Snow Ridge, whose biggest wins came in the Grade 1 San Carlos Handicap, the Grade 2 Kentucky Cup Sprint, and the Grade 2 Palos Verdes Handicap, is a 13-year-old son of Tabasco Cat.

LEXINGTON, Ky. – Rachel Alexandra, the 2009 Horse of the Year, is in foal to two-time Horse of the Year Curlin. Stonestreet Stables, owner of both the mare and the stallion, announced the pregnancy Monday.

The mating of the two Horses of the Year was the first for 5-year-old Rachel Alexandra. The Medaglia d’Oro mare was bred on Feb. 21, 2011. The horse’s gestation period is 11 months, and Rachel Alexandra’s estimated foaling date is Feb. 1, 2012.

Curlin, 7, stands this year for $40,000 at Lane’s End Farm in Versailles, Ky., where the breeding took place.

LEXINGTON, Ky. – Fasig-Tipton’s Florida sale drew good reviews for its new location, the Palm Meadows Training Center, but mixed financial results at Thursday’s auction proved the market for 2-year-olds could still be tough sledding.

LEXINGTON, Ky. - Aurora, the dam of Blame’s sire Arch, died Thursday at age 23 after foaling an Empire Maker filly.

According to an announcement by Middlebrook Farm in Lexington, the stakes-winning Danzig mare appeared to be in good condition after “an uneventful delivery.” After a satisfactory post-foaling examination, Aurora was turned out with her foal in a paddock but died several hours later of a suspected hemorrhage of the uterine artery.

A filly by recently exported Belmont winner Empire Maker brought the only seven-figure price Thursday at Fasig-Tipton’s Florida select 2-year-old sale.

Sold to Darley Stud owner Sheikh Mohammed al-Maktoum for $1.35 million, the bay daughter of the Pulpit mare Half A. P. had worked an eighth-mile in 10 seconds at the Monday under-tack show.

Kim Lloyd, the Barretts vice-president for sales, is feeling buoyant these days.

Two weeks before the Barretts March auction, the mood this year is better than in 2010. Last season’s 2-year-old market overall performed better than in 2009. Cumulative North American sales gross grew 10 percent even though 6 percent fewer horses sold, and the North American average price swelled 16 percent to $38,572.

The 2010 Barretts March sale didn’t enjoy gains, but, this year, Lloyd expects good things from the auction’s new night session this year at Fairplex Park in Pomona, Calif.

The youngsters Lucky Pulpit and Papa Clem are likely to dominate California’s Thoroughbred stallions in book sizes this spring, with each expected to attract 100 mares.

For many other stallion owners, the current breeding season will be a struggle to attract a significant number of mares. To drive business, some farm owners have continued a practice from recent years of discounting stud fees, or offering incentives on racing results of the offspring to lure mares to their stallions.