Fire Country’s Leven Rambin is opening up about her decision to undergo in vitro fertilization (IVF). “I’m going to talk to you a little bit about why I’m going to do IVF at 36 years old,” Rambin, 36, began a Friday, June 5, TikTok. “Some of y’all think it’s kind of young. Some of y’all think it’s kind of old. Depends on who you talk to. Depends on what doctor you talk to. One doctor said I was old and barren and decrepit. The other one said I w…