Why There’s More Births During a Full Moon

Small Doses of Knowledge
2 min readDec 3, 2023
Image created using AI: Lexica

Some people believe that it has something to do with the gravity that the Moon exerts on us, but this theory doesn’t make sense:

The gravity of an object depends on its mass; the Moon has a constant mass. The different phases of the Moon are just the Earth’s shadow on the Moon. Saying that the Moon has more gravity when it’s full is like saying that a person’s weight halves if they cover their legs with a blanket. It’s not because we can’t see the person’s legs that they cease to exist and the person’s weight becomes half of what it was when we could see their legs.

The fact that there are more births during the full moon has more to do with humans than with the moon itself.

A woman’s gestation period is around 295 days. This is not something that everyone knows, because doctors count a woman’s gestation period from the moment she stops having her period, and not from the moment the egg is fertilized until she gives birth.

On the other hand, it takes around 29.5 days for the Moon to go through all its phases (which is why several months of the year have 30 days).

Because the number 295 (days of a baby’s gestation) is ten times greater than the number 29.5 (time for the Moon to pass through its four phases), this means that a baby will be born on the same Moon on which…

--

--