Congenital abnormalities of the female genital tract (abnormalities of the mullerian duct) are estimated to occur in one of 500-2000 women, most commonly manifesting as various types of uterine anomalies. Partial or complete agenesis of the fallopian tube and/or ovary is rare, true incidence of which is unknown. Among the congenital abnormalities of the female genital tract, malformations occur in 3-4 % of infertile women. We present 3 cases of unilateral agenesis of fallopian tube and/or ovary diagnosed during infertility work up. Case 1 had a unilateral partial tubal agenesis with normal ipsilateral ovary and a normal contralateral ovary and tube. Case 2 had unicornuate uterus with a rudimentary tub on one side and the other tube and ovary being normal. Case 3 showed absence of ipsilateral fallopian tube and ovary.