A study published in the International Urogynecology Journal bears out her opinion. The vaginal opening likely changes only slightly after birth, Tarnay says. While exercising , be sure to breathe normally and try not to use the muscles in your legs, stomach, or bottom. This typically occurs if the vagina is too short or tight or they have a prolapse, where the uterus, bladder , or other organs fall out of place, typically after childbirth. Pink Pussy Lips Top Nude Babes This was the first time there was a true before-and-after measurement, Tarnay says.