When 27-year-old UK mom-to-be Lindsay Hasaj recently had an ultrasound, she found out that in addition to carrying her baby -- she also has an extra uterus.

Hasaj has an extremely rare condition called uterus didelyphs. ParentDish reports her case wasn't detected before pregnancy, because Hasaj is normal externally. She has one vaginal entrance, but inside her vagina splits in two.

Uterus didelyphs cuts a woman's odds of getting pregnant in half. There's only a 50% chance at any time that the sperm will fertilize via the vagina which is currently ovulating. Hasaj is expected to have a normal pregnancy, and her baby is healthy -- growing inside one of her wombs.

Momlogic Ob/Gyn Suzanne Gilberg-Lenz tells us only one in every 3,000 women have this rare condition. She says, "a true didelphys will have two complete and separate uteri each with a horn that communicates with one fallopian tube, a separate cervix and sometimes a separate vagina, or at least a vagina with a septum or fibromuscular wall that divides longitudinally at the midline. Some women have a normal lower tract (vagina) and paired upper tract (cervix and beyond)."

Women with the condition are often asymptomatic. Dr. Gilberg-Lenz says the best means of diagnosis and evaluation (in addition to physical exam) are ultrasound, especially 3-d, and mRI. A patient with uterus didelyphs should have her upper urinary tract including her kidneys, ureters, etc. evaluated thoroughly. Each cervix should also have it's own pap smear.

Over 80% of pregnant women with uterus didelphys deliver via cesarean section.