3 Timeline of Prenatal Development Day 1- Conception takes place> Period of the Zygote7-14 Days- fertilized egg implants in mother’s uterus
4 Timeline of Prenatal Development 18 Days- heart begins to beat21 Days- pumps own blood through separate closed circulatory system with own blood type.28 Days- eye, ear and respiratory system begins to form
5 Fertilized egg is implanted in mother’s uterus Period of the ZygoteZygote grows to be about the size of a pin headConceptionFertilized egg is implanted in mother’s uterus(10-14 Days)
6 Period of the Embryo 2 weeks after conception 2 months after conception*All Organs form*Attachment of Umbilical Cord to uterus*Amniotic Sac & Fluid formed
7 First Month Cell multiplication begins Egg attaches to uterus lining The heart, which is no larger than a poppy seed, has begun beating.
9 Two MonthsThe embryo is about ¼” inch long and has distinct, slightly webbed fingers.Veins are clearly visible.The heart has divided into right and left chambers.Bones begin to formDevelopment of internal organsThe embryo is attached to the mother by the umbilical cord.
20 Eight MonthsYour baby is gaining about half a pound per week, and layers of fat are piling on.He has probably turned head-down in preparation for birth.Fetus may react to noise with jerking actions.
22 Nine MonthsYour baby is a hefty 6 to 9 pounds and measures between 19 and 22 inches. As he becomes more crowded, you may feel him move around less.Disease-fighting antibodies are taken in from mother’s bloodFetus “drops” into pelvis and is ready for birth
23 Pregnancy is broken up into Trimesters FIRST Trimester (1-3 Months)Ovum (a female egg)Zygotic & Embryonic period of DevelopmentWhen all organs, nerve and brain cells DevelopSECOND Trimester (4-6 Months)“Golden Trimester” when Mother feels the bestThird Trimester (7-9 Months)Baby’s organs and body systems matureBaby gains weight
24 “Where I Started” Booklet Crafty & Creative Time!“Where I Started”Booklet