Re: Why are two woman witnesses, equivalent to only one male witness in Islam ?
It is not assumed that all women will be pregnant during testimony. The assumption is that a woman has the possibility of being pregnant. Some women will never get pregnant but you might not have that knowledge at the time you use them as a witness. And it would unreasonable for you to ask them to plan their pregnancy around the time you need their testimony.
Women and men are equal in front of God, they both have the same purpose of worshiping God. Other people might think differently but God, the creator of both, has made it very clear what their purpose is, worship God alone.
Then in the light of your this statement pregnant-women theory holds no water and you are just trying to rationalise