Background: Religious (halachic*) infertility' results from precoital ovulation prior to immersion in a ritual bath (mikveh) 7 days after menstruation, as mandated by Jewish religious law. Previous authors recommended treatment with estradiol to postpone ovulation and enhance pregnancy rates.
Objectives: To evaluate the prevalence of halachic infertility in an ultra-Orthodox jewish community, and assess the efficacy of estradiol treatment in postponing ovulation and increasing pregnancy rates.