Sure, although there are also many Christians who are pro-choice. In most cases there is a happy medium to be drawn in the form of a cut-off date for gestation after which everyone can pretty much agree that the mother has had sufficient time to consider her position. Terminating a six-month-old foetus is clearly in no way the same thing as terminating a six-day-old one that you didn't know was there and didn't want. And of course there are extenuating circumstances such as rape or where the woman has been detained against her will to prevent abortion occurring within a suitable timescale.

Everyone will agree that it is better for a child to be born into a family that wants it, and science shows that it is many times better for that family to include its biological mother. So the mother actually wanting the child is really very important, if we are looking to maximise human happiness rather than to maximise the population of humans on earth (I don't think we're short). And forcing a mother to carry a child she doesn't want is cruelty, especially since she may herself die as a result. Everyone involved has to agree, and as we already pointed out, if you haven't reached majority, you don't get to have a vote since you don't yet understand the issues. Thus we have to side with the mother by default.