-
Period: to
Zygote
First two weeks -
Period: to
First Trimester
week 1 through week 12 -
Period: to
Embryo
Week 3-8 -
Period: to
Fetus
9th week - birth -
Period: to
2nd Trimester
week 13 to week 27 -
Week of detection
18-20 weeks -
week of Viable Birth
23 weeks -
Period: to
Third trimester
week 28 to the birth -
Full Term Pregnancy
39 weeks