I just bought a pair from Target. I LOVE them but they sag down in the crotch area

Anyone else have this issue? Is there a better place to buy maternity leggings? I like the Target ones because they look like skinny black pants, so I can wear them to work with long tops.
Re: Maternity leggings
BFP #1 May 20, 2013 MC June 27, 2013 BFP #2 August 2, 2013 Baby Boy born 4/25/14 (3 weeks overdue!)
April 14 August Siggy Challenge- "This time last year.."
Have you tried regular leggings in a bigger size to compare the fit?
October 30, 2011
https://m.nordstrom.com/Product/Details/3586648?origin=keywordsearch