You're ignorant of the fact that Christian is an extremely broad label with the only commonality being a belief in Jesus (and study or worship of his life and teachings), that's fine and can be corrected by learning or just asking people in, or familiar with those communities.
As I said, Christian is a pretty broad label not to be confused with the more narrowly defined Catholic Church, which is strictly against IVF[1]. Many of the Protestant Christian churches don't prohibit it, a non-exhaustive list here[2].
[1] http://www.vatican.va/roman_curia/congregations/cfaith/docum...
[2] https://ivf-worldwide.com/education/introduction/ivf-global-...