Imperfection can only be measured against a standard of perfection.
Which yardstick you use to gauge this standard must come under scrutiny.
In the case of a human birth, what would the perfect standard be ? Have there been any ' perfect ' humans born ?
Imo the terms perfect or imperfect do not apply.
Every new born baby must be given the nurturing and opportunity to develop into a healthy free thinking adult to make the best of their life without having to question if they were borm imperfect.
Best wishes.