A Thai elephant has become pregnant after IVF treatment, boosting hopes in the species' fight against extinction. Vets confirmed that Phang Sao, a 26-year-old elephant, responded well to the procedure which involved injecting her with frozen sperm. An elephant is pregnant for a 22-month period and Phang Sao is expected to deliver her artificially-bred calf between August and September next year. She is being given special care by the vets in Mae Sa Elephant Camp in Chiang Mai to avoid a miscarriage. Vet Ronnachit Roongsri said: "We will take care of Phang Sao extensively until she is due to deliver her baby, which will be around August or September of next year. "We feed her as much as she wants and we look after her health, giving her our best care."