Unwanted pregnancy?

 I've come across the phrase 'unwanted pregnancies' many a time and perhaps it is standard term in vocabulary and linguistics. Nonetheless I prefer we rather use the phrase 'unprepared pregnancy' to refer to the same meaning. Or even 'unintended pregnancy'.

One can't 'want' to have sex and be 'unwant' about one of the natural outcomes of the same. Most importantly, I prefer the proposed change of vocabulary since the former phrase appears derogatory in its reference to a child, who has had no say whatsoever in its own existence.