BADMINTON, UNITED KINGDOM - MAY 07: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Zara Tindall carries daughter Mia Tindall after competing in the cross country phase of the Badminton Horse Trials on May 7, 2016 in Badminton, England. (Photo by Max Mumby/Indigo/Getty Images)

BADMINTON, UNITED KINGDOM - MAY 07: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Zara Tindall carries daughter Mia Tindall after competing in the cross country phase of the Badminton Horse Trials on May 7, 2016 in Badminton, England. (Photo by Max Mumby/Indigo/Getty Images)