Jenh and ShaunaHatch,
Welcome to our SCLS community!
First to ShaunaHatch, I'm so sorry to hear about your daughter's passing at such a young age -- regardless of the cause. I hope that you do get clarity about what went terribly wrong. FYI, in the past 15 years I've been through more than 25 invasive surgeries (mostly related to muscle and nerve damage caused by my earliest episodes of SCLS, and specifically caused by the excessive quantity of fluids given to me during those early episodes), and none of them triggered in me an episode of SCLS, whether before or after going on an IVIG therapy.
Second to Jenh, to reinforce what Dr. Druey told you, I too have never heard or read about childbirth being the trigger of an episode of SCLS. However, ironically, the first identified case of what we now call SCLS, or Clarkson's Disease -- namely, the case described by Dr. Bayard Clarkson and colleagues in an article published in 1960 -- was about "a thirty-four year old white woman of Italian descent" in otherwise excellent health, who had had two uneventful, full-term, spontaneous baby deliveries at ages 29 and 31, and both of her children had survived and were doing well. However, she went on to have ten severe episodes and almost a dozen minor episodes during 1957-58 of what we would now recognize as SCLS that correlated with her menstrual cycle -- either a couple of days before or else during or right after.
Dr. Clarkson and colleagues conducted every kind of laboratory and other studies on her, and tried everything to prevent, stop or minimize her episodes, going so far as performing a hysterectomy and later removing her ovaries, but nothing worked, and she eventually died during a severe episode in January 1959. The only constructive thing they could do in her honor was to write and publish a detailed report on her case and everything that they had done, in order to warn future doctors to be on the lookout for this kind of mysterious illness.
When I finally looked up and met Dr. Clarkson in person back in 2011 -- he was in his mid-80s then, and it was in his office because he was still doing medical research, though on cancers -- he remembered this patient as if this had all happened the day before, rather than more than 5 decades before. He was almost moved to tears telling me how frustrated he had been all this time, and how guilty he had felt, that he had not been able to save her life. And when I told him what had been learned about SCLS since 1960, and how the illness was now named in his honor, he almost fell off his chair! He had no idea, because he had never encountered another patient with those same symptoms, so he didn't even know that it was referred to as SCLS, never mind as Clarkson's!
If you want to read that pioneering article, write to me at firstname.lastname@example.org and I will send it to you.