I tried literally everything. Sex, bouncing, nipple stimulation, walking, stairs, etc. and none of it worked for me... I had to be induced and I was in labor for 19 hours and hard labor for 11.. So it didn't help at all 😂
It may be uncomfortable but I had my membrane swept and then walked 2 miles and then had sex and bam was in labor (4cm dilated 100% thinned) within the hour after sex :P (I was 39 weeks)