Precisely SummerPhD We will include both actually all as you ll find the statistics on this the progression of Diagnosed Stage One TTTS cases are quite wide ranging The contentious point I am referring to is the assertion that The natural history of stage I TTTS is that more than three fourths of cases remain stable or regress without invasive intervention with perinatal survival of about 86 Therefore many patients with stage I TTTS may be managed expectantly This is a highly questionable point competing figures exist Also these non progressing Stage Ones still have a 14 rate of mortality so I guess something other than TTTS killed One in Six of them Dr Simpson IS referring to that About Three Quarters when she assigns a Perinatal Survival of about 86 to them correct Again I thank you for your time on this it is appreciated that there is a person of your academic caliber working on this page