I didn't "hear" that, I read it. Just Google search, "how soon do women know they are pregnant" You will find it. It can be tested as quickly as 10 days but that is rare. A concerned woman who was fearful of becoming pregnant would know the signs.
The jump from 6 weeks to 21 weeks is because that is the legal spread in the nation. Some states ban abortions at 6 weeks but others wait until 21 weeks... at 15 weeks some states allow it some do not so the person would need to know their state's law. It does happen that 1 in 400 women may not know they are pregnant until the 15 week mark. If that happens, it becomes harder to get abortions and rightly so as the laws exist to protect women and mother's in the case of wrongful death of unborn child in utero. The law must be fair and unbias.
What is it exactly that you are seeing that is "unconstitutional" about religion? For that matter, how is LGBTQ's "self view" not the same as the religious person's "self view"? I support their rights to live freely as they choose, just don't push the views in my face constantly. In many ways I see LGBTQ and Religion as ALMOST THE SAME, yet opposing, thing. Religious people say, "This is what I believe to be true for me & others, accept me as I am. Don't deny me of my rights to practice what I believe or try to change me or it." The LGBTQ people say, "This is what I believe to be true for me & others, accept me as I am. Don't deny me of my rights to practice what I believe or try to change me or it. I see LGBTQ go too far saying, "In fact others need to change their views and accept LGBTQ values." Pushing their views on others, forcing them to comply with LGBTQ values and beliefs. I push against that part.
Saying people of religious faith should not serve in government is like saying LGBTQ can not serve in government. Or if they do serve, they MUST keep their beliefs apart from their job. That is discrimination on the basis of creed. That would be unconstitutional. Permitting religion or even supporting religious views as freedoms is not unconstitutional unless the government were to establish a "state religion" for all the people to follow. I would not support that either. People in government praying for gods or God's help in all things, I fully support and am not afraid of people asking for help from God/gods in any decision making they do. It shows humility and wisdom.