I see no dishonor that a single woman with children might not be able to both handle having a 24/7 job with that amount of stress for very long AND handle her children (which is also a 24/7 job). They'll probably switch to any sort of job that is not 24/7 and pays comparably, just to have the time to also take care of their kids.
The other STEM fields don't involve that level of stress, and while I'd expect some rarity of women due to lack of interest, there is by and large much less SHIT to be suffered in those fields than in most generic IT jobs.
In my experience, the most common job for women in IT is software Quality Assurance, where the women often seem to outnumber the men, while the network administrators and the DBAs are very rarely women. QA is essentially a 9-5 job, while the network administration is usually on call 24/7, and DBA are also on call very frequently, but less so than the network admins. This is just my personal experience, no hard statistics, but I've been in this field since 1996 and the patterns appear to be consistent over time.