Cut and paste the file into your Documents Electronic Arts The Sims 3 Mods Packages folder. As with all default replacements, you may only have ONE installed for a particular mesh at a time. The pregnancy morphs for these meshes features a slightly larger pregnancy belly as well as a breast size increase during the pregnancy. These sets add a pregnancy morph to all maxis-made adult female meshes. There's really no reason to use this anymore unless there's some CC clothing out there that matches it. ('cmar_fpreg_morphs' was the original upload. Special notes: The package 'cmar_fpreg_morphs_EA' - is the full set of Nude Top, Nude Bottom, and Relaxed Jeans, now redone to conform to the EA standard top and bottom pregnant shape, and with the odd indentations in that standard shape at the back sides of the waist smoothed out.
Some of you have also noticed that the jeans enabled in the game for maternity wear don't actually change shape when the Sim is pregnant, leading to a pregnant upper body while the lower stomach stays flat. You've probably seen the pregnant Sim women lose their belly when they take a shower or bath. These mods supply the missing pregnant morphs for the nude adult female and the 'relaxed jeans'.