BUDAPEST, May 8 (Xinhua) -- Layla, the world's first rhino conceived by artificial insemination, now weighs more than 200 kilograms, zoo officials reported on Tuesday.

    Layla, who weight 58 kilograms when she was born January 23 at Budapest Zoo, had to be bottle-fed since her mother Lulu was not willing to nurse her.

    The calf reached 100 kilograms on March 10 and has doubled her weight in the two months since then, zoo officials said.

    Layla is being allowed to get nearer to the adults, so that they get used to one another's presence. But she is not being permitted to mix with adult rhinos until she gets closer to their size, officials said.

    Layla was named by the public in April. More than 5,000 people voted in the naming contest. Layla originates from Egypt and means "born at night."