FALSE statement about Ulcerative colitis is

Patients with quiescent UC and CD have normal feility rates. The fallopian tubes can be scarred by the inflammatory process of CD, especially on the right side Ulcerative colitis Crohn's disease Male / female ratio 1:1 1.1 - 8.1 Smoking May prevent disease May cause disease Oral contraceptives No increased risk Odds ratio 1.4 Appendectomy Protective Not protective Monozygotic twins 6% concordance 58% concordance Dizygotic twins 0% concordance 4% concordance