IIRC, they were talking about the embryo's right to life, regardless of the mother's personal circumstances, health or the viability of the pregnancy. I don't recall them talking about any dangers to the mother.
The SPUC lecture was along the lines of:
"Pregnant due to rape? Not the baby's fault. Get it adopted if you don't want it.
Pregnant due to careless sex and can't cope with a baby? Not the baby's fault. Get it adopted if you don't want it.
You had a planned pregnancy and now scans show the baby will be horribly disabled and you don't know if you can cope with that? Well, you wanted the baby, so have it and just deal with it. If you can't deal with it, get it adopted.
You had a planned pregnancy and now scans show the baby will has xyz condition and hasn't got a chance of survival outside the womb? Well, what do doctors know. Maybe they're wrong. Do you really want to risk killing a baby if they're wrong?
You had a planned pregnancy and now the doctors say you should have an abortion because you've got xyz health condition and the pregnancy's likely to kill you? Well, that's just selfish. And the doctors might be wrong anyway. You should continue with the pregnancy, cross your fingers and hope for the best. "
Followed by touching stories of women who'd decided not to abort in the above circumstances and were very happy about their decision. Theyalso had graphic pictures of abortions.
I should state here that I'm pro-choice and believe that women should have the right to choose abortion. I believe that the rights of the person who already exists outweighs the rights of the embyro / foetus, at least up to the point where the baby can survive outside the womb.