It's also possible for there to be multiple bottlenecks in the pipeline where women and girls are dropping out - including elementary school, college, entry lev

It's also possible for there to be multiple bottlenecks in the pipeline where women and girls are dropping out - including elementary school, college, entry level, and experienced engineers. There seems to be evidence that there's an effect at each of these levels that causes women to switch to other fields. If so, the existence of a problem at one stage in the pipeline is a poor excuse for failing to address a bottleneck at a later stage. Particularly when the actor in question is mostly involved in the later stages.