Prenatal development

1. Prenatal Development

2. Prenatal Development Month by Month Period of the Ovum Period of the Embryo

3. Prenatal Development Stages Period of the Ovum (zygote) 0-2 Weeks Conception / Fertilization Cell Multiplication – single cell divides into 2 4 8… Implantation – cells attach to wall of uterus About the size of a pin head.

4. Period of the Embryo 2 – 8 weeks Formation of most major organs and bones; Formation of placenta, amniotic fluid and umbilical cord; nourishment begins to pass Heart begins to beat Amniotic fluid acts as a “shock absorber” and is replaced every 3 hours.

5. Period of the Fetus 8 weeks - Birth Organs mature and begin to function; Quickening – movements can be felt by the mother (4 th – 5 th month); Heartbeat can be heard with a stethoscope (approx. 5 th month); Rapid weight gain in later months;

6. Vernix Caseosa : cheesy, thick substance which covers and protects baby’s skin; Lanugo : Downy fuzz which covers and protects baby’s skin; Fetal Position : Curled up, knees brought up- position of comfort;

7. Lightening : Baby moves lower into pelvis in anticipation of delivery; Fetus can suck its thumb, cough sneeze, yawn, & hick-up.

8. 6 weeks 12 weeks 16 weeks 24 weeks 36 weeks 40 weeks

9. Period of the Fetus

10. Period of the Fetus

11. Period of the Fetus

12. Period of the Fetus