Third, the gravitational effect of the moon is just as potent during new moonsâwhen the moon is invisible to usâas it is during full moons. There is a more serious problem for fervent believers in the lunar lunacy effect: no evidence that it exists.
Answer: Each pregnancy is divided into three trimesters. Each trimester is roughly a third of your pregnancy. These three trimesters have different emotional and physical happenings that make them unique. Here is a guided tour through each trimester:
A quarter of a year, one fourth, is three months, as in financial quarters. I don't know if there is a term for 4 months. 12 weeks in a trimester, 3 months in a trimester, 4 weeks in a month. since there is 3 trimesters and there is 40 weeks in a normal pregnancy that means approximately 13 weeks per trimester.