Around the 20th week of my pregnancy I started having hip pain. I was using pillows, extra padding, different sleep positions on my side and nothing was really letting me sleep through the night. My mattress is pretty firm, so adding the egg crate really helped. I am sleeping much better now and it was a simple inexpensive investment! Took about a week and a half to arrive (only frustrating part), but it was easy to unpack use right aways and it didn't smell funky which is usually a problem with other foams.