Introduction to Pregnancy

Events that occur after fertilization until the infant is born.

• Pregnancy

• Fertilization

• Gestation Period

• Embryonic Period

• Fetal Period

Time from last menstrual period until birth

• Pregnancy

• Fertilization

• Gestation Period

• Embryonic Period

• Fetal Period

When the sperm 23 chromosomes combine with the 23 chromosomes of the ovum

• Pregnancy

• Fertilization

• Gestation Period

• Embryonic Period

• Fetal Period

Fertilization - Week 8

• Pregnancy

• Fertilization

• Gestation Period

• Embryonic Period

• Fetal Period

Week 9 to birth

• Pregnancy

• Fertilization

• Gestation Period

• Embryonic Period

• Fetal Period

First cell of an individual

• Conceptus

• Embryo

• Fetus

• Zygote

General term for a developing human offspring

• Conceptus

• Embryo

• Fetus

• Zygote

Specific name for a developing offspring from fertilization to week 8

• Conceptus

• Embryo

• Fetus

• Zygote

Specific name for a developing offspring from week 9 to birth

• Conceptus

• Embryo

• Fetus

• Zygote

Embryonic Period

• 8 weeks (2 months)

• 32 weeks (7 months)

• 40 weeks (9 months, ~280 days)