I've had all my 3 before 40 weeks ( second was induced )
With first we had sex 3-4 days before ( we avoided all pregnancy ) hot curry I love so had that every weekend anyway
Waters went at 37+3
With Oliver we had sex 9 days before, I had a cervix check 8 days before, day before I was walking about a lot, prawn curry night before. Contractions started at 38+4