פירוש על קידושין 69:2

R. Yohanan b. Beroka holds that women are obligated to procreate and to fear their parents—so we now have a situation of two verses that come as one, and therefore we should not have a rule that women are obligated in PNTB commandments.

The Talmud now will explain why both verses are necessary and therefore are not really a case of “two verses that come as one.” The Torah had to explicitly obligate a woman in procreation (according to R. Yohanan b. Beroka) for otherwise I would have thought that she is exempt because the Torah instructs humankind to “conquer” and women’s nature is not to conquer (this can be certainly be disputed, but there are people who might agree that men have a greater tendency towards war).