Tag Archives: Astronomy


Is there any relationship between the times when babies are born and the lunar cycle?

There are published works that show that there is such a relationship. One study looked at 5,927,978 French births occurring between the months of January 1968 and the 31st December 1974. Using spectral analysis, it was shown that there are two different rhythms in birth frequencies: –a weekly rhythm characterized by the lowest number of births on a Sunday and the largest number on a Tuesday and an annual rhythm with the maximum number of births in May and the minimum in September-October. A statistical analysis of the distribution of births in the lunar month shows that more are born between the last quarter and the new moon, and fewer are born in the first quarter of the moon. The differences between the distribution observed during the lunar month and the theoretical distribution are statistically significant.

People are 80% water. And the changes in barometric pressure changes tides…does that change how we act or react? Some say yes, others no. Those that say no site the power of folklore/tradition/urban legends, misconceptions and cognitive biases (all bad events don’t occur during the full moon and all events that occur during the full moon aren’t bad!). Talk to nurses who work labor and delivery on a regular basis, midwives, busy doulas or experienced childbirth educators and they will all tell you that they believe in the power of the full moon plus changes in barometric pressure from cold/warm fronts (but that is another article!)

Examined was the relationship between lunar position and the day of delivery and the synodic (in astronomy, length of time during which a body in the solar system makes one orbit of the sun relative to the earth) distribution of spontaneous deliveries, especially in relation to the presence of a full moon. A retrospective analysis of 1248 spontaneous full-term deliveries in three-year period (36 lunar months) was done at the Department of Obstetrics and Gynaecology, Civil Hospital, Fano (Marche, Italy). The results showed a connection between spontaneous full-term deliveries and the lunar month.