pregniotin

例句：

1. 1. During the first trimester of pregnancy, women often experience morning sickness.
   怀孕初期，孕妇经常经历晨吐。
2. 2.The doctor advised her to take extra care during the second trimester of pregnancy.
   医生建议她在怀孕的第二孕期要多加小心。
3. 3.Pregnancy is a natural process that occurs in women during their reproductive years.
   怀孕是女性在生育年龄期间自然发生的过程。