Complex sentence: OTS's programs for women have opened doors in the realm of Jewish Orthodox female scholarship and leadership that had previously been shut to the entire female population as the first school to teach post-high school women Talmud on a high level.
Split into simpler sentences: OTS's programs for women have opened doors in the realm of Jewish Orthodox female scholarship and leadership that had previously been shut to the entire female population. OTS started the first school to teach post-high school women Talmud on a high level.