When to Conceive a Baby to Share Sia's Birthday
Sia Kate Isobelle Furler is an Australian singer and songwriter. Born and raised in Adelaide, she started her career as a singer in the acid jazz band Crisp in the mid-1990s.
Plan a Baby Born on Sia's Birthday (December 18)
How to Plan a Baby for Sia's Birthday (December 18)
If you dream of your child sharing a birthday with Sia on December 18, the optimal conception date is around March 27 of the preceding 38-week gestation cycle (266 days before birth).
Use the interactive slider above to adjust the gestation period between 35 and 41 weeks and observe how the conception timing match (%) and clinical delivery window probabilities change in real time.
When Was Sia Conceived?
Sia was born on December 18, 1975. Based on the standard human gestation period of 38 weeks (266 days from ovulation/conception), she was most likely conceived around March 27, 1975.
While only about 4%–5% of babies arrive on their exact due date, nearly 60% are born within a ±7-day window around their target date when conceived during the peak 5-day fertile window.
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