Essential oils during labor?

Ka

I wasn't sure where to post this. I just had my OB apt and she was asking me what kind of things I had questions about during labor, and she told me shes been encouraging her patients to use essential oils. She said she rubbed essential oils on one womans perineum while she was pushing and she didn't tear at all. I'm just wondering if anyone else used essential oils and what your opinions were? Also what kinds did you use? Thank you!