Elena Gilbert in the books does not have children,as in the series.So,maybe you thought of Nina Dobrev who plays Elena in the series - no she hasn't got any children.
The uterus is part of a woman's reproductive system that is located in the pelvis between the bladder and the rectum. The uterus is the hollow, pear-shaped organ where a baby grows. The narrow, lower portion of the uterus is called the cervix. The broad, middle part of the uterus is called the body, or the corpus. The dome-shaped top of the uterus is called the fundus. The fallopian tubes extend from either side of the top of the uterus to the ovaries.
A pair of tiny ducts called fallopian tubes capture and conduct human eggs from a womanâs ovaries to her uterus. One fallopian tube connects each of the two ovaries to the womb. In human reproduction, semen often fertilizes the egg within the fallopian tube, as the egg approaches the uterus. A number of conditions can block fallopian tubes, preventing eggs from entering these tubes or from passing through them to the uterus.