Is it possible to have endometriosis without having had a child?

Yes: In fact, a significant number of women develop endometriosis at a young age, often ever before attempting to become pregnant. In fact the presence of endometriosis can make fertility more difficult.

Yes: Endometriosis is the implantation of tissue from the lining of the uterus outside of the uterus that can cause severe pain. Symptoms can present at any age after a woman starts menstruating, it may cause infertility.