As far as I can see, nobody has explained why this information might be gathered, or to what use it might be put later on. I think it is an appalling intrusion into the rights of women to make their own decisions.
Assuming that a woman is pregnant, knows it, but still continues to drink (perhaps heavily), how far do those who support the idea of recording all alcohol consumption think that the law should be able to go?
Should the woman be imprisoned in order that her consumption can be controlled? It is likely to be too late to help the baby after it is born, but should it be taken away anyway?
What if the child is born with no obvious ill-effects? Is non-compliance reason enough for it to be taken from its mother? Who should look after the babies who have been removed from unsuitable mothers?
As for monitoring women before pregnancy even happens, given that not all pregnancies are planned, this is akin to saying that no women of childbearing age should be allowed to drink (and why not include smoking, or eating soft cheese, or all the other things that may be less than ideal - just in case?). Are people really in favour of that level of social control? Blessed are the fruit.