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Child Development

Chapter 4-1 Prenatal Development

TermDefinition
Ovum an egg cell
Uterus is the organ in a woman's body in which a baby develops during pregnancy
Fallopian tube a tube that connects the ovary to the uterus
Sperm male cell need for reproduction
Conception sperm cell reaches the Fallopian tube, and penetrates and fertilizes an ovum
Prenatal development baby development during a pregnancy
Zygote fertilized human egg
Embryo the developing baby from about the third week of pregnancy throught the eighth week
Amniotic fluid liquid that surrounds and protects the developing baby in the uterus
Placenta tissue that connects the developing baby to the uterus. It is rich in blood vessels that allow nutrients and oxygen to flow to the baby
Umbilical cord a long tube that connects the baby to the placenta and transmits oxygen and nourishment from the mother blood to the baby
Fetus stage of development that begins around the eighth or ninth week of pregnancy and lasts until birth
lightening the baby's weight seems to shift downward, and most mothers feel more comfortable in their upper abdomen
Cesarean section a surgical procedure to deliver the baby
breech the fetus is in a seat down or feet down position in the mother's pelvis
Conception male cell penetrates and fertilizes the ovum
germinal stage first stage in a baby's development lasts about two weeks
fetus position fetus grows large during the last few months of pregnancy, it no longer has room to stretch out. it curls up inside the uterus
amniotic sac formed from special layers of cells in the uterus a sac filled with fluid that cushions the embryo
cell division single cell splits into two cells, then the two rapidly multiply to four and so on
implantation zygote attaches itself to the lining of the uterus and continues to grow
embryonic stage the second stage of pregnancy; third through eight week embryo grows rapidly
Fetal stage the third and final stage of development; Eighth or ninth week through birth
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