Course 2
During Pregnancy
Signs
Stages
First Trimester
Second Trimester
Third Trimester
Problems
Sexual Intercourse
The Three Stages of Pregnancy
妊娠

孕婦
妊娠三時期
人類的妊娠持續9個月，為了理解和敘述方便起見，傳統上，我們將它分為等時（三個月）的三個時期，每一個時期持續3個月。
Pregnancy
The Woman During Pregnancy
The Three Stages of Pregnancy
A human pregnancy lasts 9 months, and, in order to understand and describe it better, one traditionally divides it into three stages of equal length (trimesters), each lasting 3 months.

[Course 2] [Description] [How to use it] [Introduction] [Conception] [Pregnancy] [Beginning] [Development] [During Pregnancy] [Birth] [Infertility] [Contraception] [Abortion] [Additional Reading] [Examination]