Pregnancy can cause pelvic floor muscles to stretch, potentially improving sexual function if prior tightness was an issue, but deliveries can also lead to stretching, irritation, or tearing.

“during during child I guess you were asking about childhood so with pregnancy those muscles stretch a lot things are expanding and um Sometimes women will notice improvements actually in their sexual function because if they've had tight pelvic floor muscles that are causing changes in sexual response or even pain it sometimes gets better um sometimes with deliveries they get stretched they get irritated they get torn it's rare um that any of those things I find persist unless there was really a birth trauma”