WARNING: This book will make you THINK!
I first read this as part of my A-level philosophy course, have recently re-read it and can confirm that it is still the best treatise on the morality of life and death issues (including abortion, war, euthanasia, infanticide and capital punishment).
This book is a breath of fresh air in moral debates which are usually emotively dominated by religion (and in some cases women's rights too).
It brings a hefty dose of utilitarianism tempered by humanism and a good examination of side-effects. The chapters determining the best overall general theory at the beginning may be a bit hard going to those not versed in philosophy but the style is very readable and it is worth persevering as it underpins the later arguments.
In conclusion, this book is essential for anyone who wants to properly consider any of these issues for any reason.