[MARMAM] Use of total urinary oestrogens in Californian sea lion pregnancy diagnosis

Dear Marmam users, I would be grateful for any information and/or references on the possible use of Total Urinary Oestrogens to diagnose pregnancy in Californian Sea Lions. If this is an appropriate test, it would be particularly useful to know at what stage of pregnancy this can be used and also how to interpret levels obtained. Many thanks for your anticipated assistance. James Barnett Veterinarian, UK james@bdmlr.org.uk