It does make sense. If you believe a group of cells is sentient life then you should also avoid grass, plants or anything that involves cells really. Otherwise you might be a murderer. It's the same precedent. If you go for the whole human DNA thing then you should avoid cutting your toenails or your hair, since those are also groups of human cells.
You constantly talk in deaths but you completely avoid the fact that not every woman who has complications and is at risk of complications die. You try and limit yourself to the UK because it suits your argument, when it's appropriate to discuss the whole world since it's a case to occurs all over the planet.
The following quotes are from the Guttmacher institute:
• Treatment of complications has also improved with updated guidelines for postabortion care. Yet, complications from unsafe abortions are still common in developing regions where abortion remains highly restricted. Estimates for 2012 indicate that 6.9 million women in these regions (excluding Eastern Asia) were treated for complications from unsafe abortions, corresponding to an annual rate of approximately seven women treated per 1,000 women aged 15–44. However, estimates (based on a 14-country sample) suggest that, on average, 40% of women who experience complications never receive treatment.
• According to recent estimates, at least 8% of maternal deaths worldwide are from unsafe abortion; at least 22,800 women die each year from complications of unsafe abortion.
The only reason you are sticking to the UK, despite the argument being applicable wherever you are, is because you know that the above statistics are a lot higher than the one fallback line of "30 deaths" that you keep going on about.
And, from what I've read, it's somewhere around 20 weeks that a baby becomes "sentient" although that is obviously a very broad term and open to interpretation.