Trying for 2nd baby after IUI

For those that conceived baby #1 with the help of <a href="https://glowing.com/glow-fertility-program">IUI</a> or <a href="https://glowing.com/glow-fertility-program">IVF</a>, how long did you try for baby #2 without help before contacting your doctor or specialist to start taking extra measures to conceive baby #2?