When to try for #2?

Hello my little one is going to be 4 next year. For those who have larger age gaps did you intentionally plan for it? When did you know it was time to try for another baby? I feel like now that we are more established with schedules it would be easier but I’m still just a bit nervous because this toddler stage be having me looking like Cynthia from Rugrats

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Thanks in advance for any advice.