Yeah that is what they tell me. I dont know exactly how it works but I guess it just keeps you in that pregnant hormone state to some extent and that is how the
SPD happens. I am also hypermobile so my joints are naturally loose. But I cant complain to much I have 2 wonderful boys and are otherwise healthy and I really am on the mend. Thankfully My DH is also one in a million and does all the housework without any complaint.