Resources · Tools

Birth Planning

Pick the Sun signs you're aiming for. We show the most promising conception windows (and how strong the odds are), plus quick parent-friendly notes for each sign.

Planning mode Conception windows with context Timing support for people comparing possible periods.

Choose wished signs

Tip: start broad (e.g. "Fire signs"), then refine.

Planning window

Assumptions

Default: 266 days (~38 weeks)

Higher variation spreads probability across more signs.

How to use this

Choose a sign set, then aim for the highest-probability weeks. If you want a single sign, check only that sign for the cleanest recommendations.

Best conception windows

Select at least one sign to see recommendations.

Notes & disclaimers

  • This tool estimates Sun sign odds from birth-date timing only; it cannot guarantee outcomes.
  • Fertility, cycles, and pregnancy length vary; consult a clinician for medical guidance.
  • Sun sign date boundaries can shift slightly; we use common tropical sign ranges.