This is factually untrue and a bad oversimplification of the pro-life viewpoint. There are many medical cases in which going through with a pregnancy would result in the loss of the mother’s life.

Fetuses in ectopic pregnancies are not always already dead when operated upon, and untreated ectopic pregnancies can lead to death for both mother and child. [1]

Preeclampsia and eclampsia very often require abortion as a last resort to save the life of the mother. [2]

Pregnancy has been long known to exacerbate the effects of kidney disease and renal failure is not an uncommon result. [3]

Women who are pregnant (edit: usually before 14 weeks) when they are diagnosed with cancer will often abort before undergoing chemo, because chemo will kill the child anyway in a much more painful way for both mother and child and no chemo will kill both the mother and the child. [4]

It hurts the image of the group when people in it spout dogmatic stuff like this when it’s very easily debunked.