The rest are running on their own schedules. So, the exact pregnancy weeks and months are specific to each mumma-to-be and ...

The second trimester is, for many women, the easiest three months of pregnancy. Take the time now, while you're feeling better and your energy is up, to start planning for your baby's arrival.

Only 1.2 percent of abortions—about 12,000 a year– take place after 21 weeks ... in pregnancy, such as fetal viability, in the third trimester or after a certain number of weeks.

The primary analysis assessed PPI exposure to women during the 4 weeks prior to conception through the first trimester of pregnancy (12 weeks). The primary outcome measure was all major birth defects.