Interesting ATF that you use "cow" in your post , for it is often an insulting term for women in the U.K. 
If we were really "cows", that were pregnant a veterinarian would be most interested to save us. Our calf would be of course important but we more so because we could live and when healed have the chance to breed again. 
This opportunity afforded to a woman who survives a dangerous or potentially lethal pregnancy is critical for she when healthy can bear another child or at least live to raise those she has birthed. It seems to be the approach of the Jewish faith to give preference to the woman over the potential child. 
Doctors wish to save all lives but some circumstances do not give that option. I feel that all women in Catholic hospital care should know that they as mother do get preference....at least a full explanation of the situation so they can with their physician make the choice they determine is best for themselves and their family.
Our bishops are not physicians.