In the context of US Christian Evangelicals it's good to remember they are a different to UK Christian evangelicals - who are majority leftwing politically, even if socially more small c conservative.
For me, I do believe that a foetus has life and that this life is significant. I also believe that the needs of the woman are significant. Ultimately, life is messy and it's not for me to judge nor would I ever want women to be forced into back street abortions by a greater restriction on access to terminations.
Like most women (religious or not) I see a difference between a termination at 30 weeks than at 13 weeks. There is also a difference between a termination for medical reasons and because of choice. I don't think it's extreme to want the law to have some nuance, which our current law has. It recognises that life is complex.
I also strongly believe that the best way to be "pro-life" is to support women financially and with fantastic childcare and NHS as a country so that any woman who falls pregnant unexpectantly is making a real choice. Ironically the same politicians who are "pro life" and the ones who voted for the two child limit on benefits and who consistently underfund maternity services, sure start and education.
The reason I'm saying this is that even for those of us who are "very religious" in UK, many of us absolutely don't align ourselves with the American Christian right. I wouldn't want their brand of "pro-life" where women and girls suffer to be thought of as 'the Christian position'.
The only change in the law I would seek is to improve women's right to state support to raise their child, to make chosen adoption a more realistic choice, alongside legal and safe terminations.
Personally I wouldn't use the term 'pro choice' or 'pro-life' to describe my position and I wouldn't want a polarisation where everyone has to take a more and more extreme position. As you can see from the states, often that has really negative consequences.