Posted: 07/02/2013 at 18:13
There are studies:-
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. The effect of the phases of the moon seems to be particularly relevant in mothers who had birthed before.
And another in France:-
There are published works that show that there is such a relationship. One study4 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.” – Source: Full moon, Gravitational Pull and Childbirth, Birthsource.com