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:
Pregnancy by Trimester. Pregnancy is generally divided into three trimesters, each accounting for approximately 12 weeks, though the third trimester may last up to 16 weeks. Most women aren't even aware they're pregnant (or at least, aren't sure) until almost halfway through the first trimester.