Some people are believed second babies tend to come a bit earlier than the first, But i saw on article that there is no evidence to prove that. My first came at 36 weeks as normal birth. but for second i went through c-section at 38 week.
My obgyn suggested to do elective csect at 38 weeks. In case I go into labour before the c sect date.
my wife natural delivered both on EDD
had both cs at week 40